Work · Sources

Attention, phones, focus

Also called phone · focus · scroll · notification · distraction

Named sources. May contain inaccuracies or be incomplete. Not medical, legal, financial, or other professional advice.

Attention is how you select what matters and stay with it while other things compete for notice. Phones can interrupt a task, invite an unplanned detour, or take time from sleep and conversation; those are different problems. Start with one situation you want to improve, protect necessary contact, and change one optional interruption. Judge the result by the task, your experience and anything important you missed—not screen minutes alone.

What attention does during a task

You can understand a distraction more clearly by naming what was happening before the phone entered the picture.

Give attention a clear job

Reading a difficult paragraph asks you to select its meaning over nearby conversation and keep returning to that meaning as you read. Sustained attention means maintaining that engagement over time. Working memory is the information you hold and use while doing something, such as remembering the beginning of a sentence while interpreting its end. Amishi Jha's attention research and Earl Miller's cognitive neuroscience treat these as related functions, rather than one attention-span score. A missed detail, a forgotten intention and an unfinished task may need different supports. Name the task first: remembering instructions is a more useful target than becoming a permanently focused person.

The Jha Lab — Exploring Attention and Working Memory Amishi Jha — University of Miami faculty profile How working memory gets you through the day

Distinguish a switch, an interruption and a detour

An intentional switch is a chosen move to a different task. An interruption stops the current task and creates a question about returning to it. Dual-tasking means attempting overlapping activities, while media multitasking describes patterns of using more than one medium. Scrolling for an hour might involve sustained attention to a feed rather than repeated task switches; the concern may be what that hour displaced. The task-switching review by Andrea Kiesel and colleagues and Douglas Parry's media-multitasking review study different questions. For example, silencing a ping addresses an external cue; it does not by itself settle what you do when a hard paragraph makes you want a break.

Control and interference in task switching—A review “Cognitive control in media multitaskers” ten years on: A meta-analysis An Opportunity Cost Framework of Digital Well-Being

Ask what phone use adds and what it replaces

A useful phone activity can still compete with another worthwhile activity. Kostadin Kushlev's 2026 opportunity-cost framework separates displacement, substitution and interference: taking time that could go elsewhere, replacing an activity with a digital version, and disrupting an activity while it happens. These are explanatory ideas, not a diagnostic test or a proven formula for a good life. They make the question concrete: did the video call add contact you otherwise lacked, did a feed replace intended sleep, or did messages keep interrupting dinner? The answer depends on the available alternative, not merely whether a screen was involved.

An Opportunity Cost Framework of Digital Well-Being

Choose the situation you want to improve

Give an unplanned scroll a clear stopping point

You open the phone to reply, then discover that you are reading a feed. Separate the useful reply from the unplanned continuation. Douglas Parry's measurement research shows why a remembered daily total is a shaky description of what occurred; the log can help reconstruct the sequence. Add your original intention and what happened afterward. For a small practical comparison, finish the reply, close that app and return to the activity you named beforehand. That sequence is an editorial example, not a tested treatment. It gives you a specific detour to examine without calling necessary or enjoyable phone use a disorder.

Suppose a person opens a message to confirm a pickup time, follows a feed notification and returns to a half-written form much later. The interruption to examine is the optional feed detour, not the necessary pickup message. They try removing that notification while leaving the contact route available, and note where to resume the form before responding.

On the next occasion, phone minutes may remain similar because the pickup arrangements genuinely take longer. Yet the person finishes the form without the unrelated detour. Conversely, fewer phone minutes would be a poor result if an essential message was missed. This invented comparison gives the change two checks: did the intended task become easier to complete, and did important communication still work? A usage total alone cannot answer either question or diagnose an attention disorder.

A systematic review and meta-analysis of discrepancies between logged and self-reported digital media use Nir Eyal Official Site: Articles, Videos, and Newsletter

Agree on response expectations before protecting work

Writing a report and answering an urgent service request are both legitimate work, but they place different demands on attention. Gloria Mark's field research describes fragmented information work, and the UK's Health and Safety Executive treats workload and work patterns as organizational responsibilities. If your role allows it, agree with colleagues which channel means urgent, what can wait, and when you will check it. If your job is monitoring, care, operations or collaboration, planned switching may be essential. A phone setting cannot repair understaffing, unclear priorities or an impossible response standard; those need a conversation about how the work is organized.

No Task Left Behind? Examining the Nature of Fragmented Work Management Standards — Demands

Make the evening transition serve your sleep

If phone use keeps pushing bedtime later, target that transition rather than your whole day's screen total. He and colleagues randomized 38 participants, selected for poor sleep and bedtime phone use, to a 30-minute pre-bed restriction or usual behavior for four weeks. Several sleep and arousal outcomes improved, but this small pilot does not prove a universal bedroom rule or isolate light from content, time displacement and expectation. Choose a workable stopping point for several nights and note bedtime and sleep. Preserve alarms, health tools, accessibility, caregiving and emergency contact; a change to one app can be more practical than removing the device.

Effect of restricting bedtime mobile phone use on sleep, arousal, mood, and working memory: A randomized pilot trial Set up a Focus on iPhone

Make shared phone time an agreement

At dinner, one person may be waiting for a care-related call while another is hoping for uninterrupted conversation. In Dwyer, Kushlev and Dunn's restaurant experiment, the phone-available group reported more distraction and less enjoyment on average; that finding concerns an experience in a setting, not the meaning of every visible phone. Ask what access each person needs and agree on a phone-light interval with a clear end. Name a necessary check instead of guessing the other person's motive. Accessibility, work, caregiving, culture and communication needs matter. Judge the agreement by whether the people feel included and the conversation improves.

Smartphone use undermines enjoyment of face-to-face social interactions Radesky Research — Research Team

What studies found about interruptions and phone access

A result is most useful when you know the task, the people and the outcome that were actually studied.

Allow for the demands of switching tasks

In laboratory task-switching studies, people commonly respond more slowly or less accurately just after changing task rules than when repeating them. Kiesel and colleagues' review examines both preparation for the new task and interference from the old one. A switch cost is that measured performance difference; it is not a fixed number of minutes lost from a workday. Preparation, practice, timing and the tasks themselves matter. The practical implication is to give demanding work a suitable interval and make transitions deliberate when possible. It does not require ignoring useful interruptions or treating every planned change of activity as harmful.

Control and interference in task switching—A review Control and Interference in Task Switching—A Review — author-uploaded full text

Shape alerts even when you leave the phone untouched

A phone can compete for attention without being picked up. Stothart, Mitchum and Yehnert found that incoming call or text notifications disrupted undergraduates' performance on an attention-demanding laboratory task even without direct phone interaction. This supports taking optional alerts seriously, rather than assuming that refusing to answer removes their effect. The study does not establish equal harm from every notification in everyday life. A quiet device, an allowed-contact list or a scheduled check are different ways to protect a suitable task while keeping important access. Choose according to what the alert means and the cost of missing it.

The attentional cost of receiving a cell phone notification Set up a Focus on iPhone

Balance notification batching with the need to stay informed

Batching means receiving notifications at scheduled intervals instead of whenever they arrive. Fitz, Kushlev and colleagues compared usual delivery, hourly batches, three daily batches and no notifications in a randomized field experiment with 237 completing participants in India. After a baseline week, the intervention lasted two weeks. Three daily batches improved several self-reported outcomes, including concentration and perceived productivity, and reduced phone unlocks. They also increased fear of missing important notifications. The no-notification group reported more anxiety and fear of missing out; hourly batching showed few benefits. People could still open apps to check messages. This is evidence for a tradeoff, not proof of improved objective work output or a required three-check schedule.

Batching smartphone notifications can improve well-being

Use device logs to improve recall, then add context

Parry and colleagues combined 106 effect sizes comparing logged digital-media use with self-reported use. Remembered estimates correlated only moderately with logs and rarely matched the amount accurately; problematic-use questionnaires corresponded even less closely. A log is therefore useful for checking which app or time window you want to understand. It still does not explain why you used the phone or what that use did for you. Navigation, work, medical access, learning and unwanted scrolling can produce similar totals. Pair duration with purpose, content, choice and outcomes; neither a log nor a questionnaire alone tells you that someone has a disorder.

A systematic review and meta-analysis of discrepancies between logged and self-reported digital media use Daria Kuss — Nottingham Trent University

Read the internet-blocking trial as a specific intervention

Castelo, Kushlev, Ward and colleagues randomized the timing of a two-week smartphone internet block in a month-long trial involving 467 U.S. and Canadian iPhone users. The block covered mobile data and Wi-Fi; calls, texts and internet on other devices remained available. Sustained attention improved on an objective task, alongside self-reported mental health and well-being. Their intention-to-treat analyses retained participants regardless of compliance, but the primary repeated-measures analyses required complete observations. Only 119 of the 467 met the compliance threshold, and attrition and expectations limit generalization. The result supports the possibility that changing access helps. It does not establish that a single-app limit, focus mode or another-room phone produces the same benefit, or replaces clinical treatment.

Blocking mobile internet on smartphones improves sustained attention, mental health, and subjective well-being

Understand work resumption without a universal recovery timer

Mark, Gonzalez and Harris observed 24 information workers and examined related activities called working spheres. Interrupted work could have several other activities between stopping and returning; elapsed time included those activities. That is different from experimentally measuring how long the brain needs to recover after each ping. The study also found that some interruptions supplied useful work information. Its lasting lesson is to protect continuity and understand what a switch accomplishes. The popular claim that every interruption costs about 23 minutes turns a field observation into a universal cognitive rule that the study did not test.

No Task Left Behind? Examining the Nature of Fragmented Work

Where broad phone rules outrun the evidence

Choose phone placement from your task and access needs

The mere-presence question asks whether an unused nearby phone reduces cognitive performance. Parry's preregistered review of 56 studies and 7,093 participants found a significant pooled effect for working memory, with null summary effects for other cognitive functions and substantial methodological uncertainty. Böttger, Poschik and Zierer's 2023 synthesis combined 22 studies and 43 effects involving phone presence or use: the overall effect was small (g = −0.14), memory was affected (g = −0.23), and the attention subgroup was not significant (g = −0.07). These standardized differences are not percentages of brainpower lost. The reviews differ in scope and analysis. Compare safe placement options if useful; they do not establish one mandatory distance for everyone.

Does the Mere Presence of a Smartphone Impact Cognitive Performance? A Meta-Analysis of the “Brain Drain Effect”Does the Brain Drain Effect Really Exist? A Meta-Analysis

Judge competing tasks without labeling a person's ability

Reading while composing a message can create an immediate conflict, but a person's usual media habits are a different research question. Parry and le Roux's meta-analysis of 118 assessments found a small pooled association between media multitasking and cognitive control that varied with the measure and outcome. Most included assessments involved students, and the review did not resolve causality. It cannot tell whether media habits change cognitive ability, people with certain difficulties multitask more, or other factors explain the relationship. Judge the actual arrangement by errors, recall, time and strain. A habit score does not prove a stable deficit or settle how a practiced combination will work.

“Cognitive control in media multitaskers” ten years on: A meta-analysis

Match a digital break to the outcome being studied

Short breaks and a two-week internet block are different interventions. King, Moon and Kushlev randomly assigned 640 college students to usual behavior or a daily 30-minute screen-free interval after waking, before bed or at a chosen time for seven days. The main comparison found no improvement in daily affect, meaning reported pleasant versus unpleasant feelings; compliance was difficult. Some analyses of actual practice found better outcomes, but those associations do not carry the same causal weight as random assignment. Eight students with no daily outcomes were excluded. Read this alongside the positive internet-blocking trial: different access changes, samples and outcomes can produce different answers, so neither establishes one universal digital-break rule.

Time-Specific Digital Detox Interventions: Effects and Effectiveness Among College Students Blocking mobile internet on smartphones improves sustained attention, mental health, and subjective well-being

Describe a digital break by its observable effects

A planned break can create more room for another activity; calling it a dopamine reset adds a biological claim. Berridge and Robinson's review distinguishes reward-related wanting from pleasure or liking and discusses addiction mechanisms more complex than a depleted pleasure tank. It supplies no short reset timer for ordinary scrolling. Meanwhile, the mobile-internet trial tested a substantial access change, not a validated detox dose. The useful unresolved questions concern which changes help whom, by what mechanism and at what cost. Notice urges, relief, boredom, sleep and choice in ordinary language; boredom alone does not establish withdrawal. Persistent loss of control with distress or impairment deserves assessment rather than a self-assigned addiction label.

Liking, Wanting and the Incentive-Sensitization Theory of Addiction Blocking mobile internet on smartphones improves sustained attention, mental health, and subjective well-being Daria Kuss — Nottingham Trent University Anna Lembke, MD — Stanford Profiles

Ask what a young person experiences online

Research on adolescent social media and health includes helpful connection and harmful experiences, with different patterns across people and activities. The National Academies' reviewed report did not support a population-level conclusion that social media causes changes in adolescent health. That conclusion does not mean an individual cannot be harmed. Look directly at harassment, exploitation, harmful content, social comparison and displaced sleep, while preserving useful support, identity exploration, creativity, information and community. Jenny Radesky's pediatric work adds developmental stage and family context. Discuss needs and boundaries with the young person using age-appropriate family and professional guidance. Duration alone cannot carry those meanings, and adult focus experiments cannot become youth guidance without considering age and needs.

Social Media and Adolescent Health — Chapter 4: Social Media and Adolescent Health Radesky Research — Research Team

Keep your place when work changes

Leave a brief return cue when the situation allows it

Attention residue means thoughts about the task you left keep intruding while you handle another task. Sophie Leroy and Theresa Glomb's 2018 studies tested a ready-to-resume plan: briefly recording where you were and what you would do on return. It reduced residue and improved performance on the interrupting task. The researchers did not test whether performance improved after returning to the original task. A private example is: “Checked rows 1–20; next compare row 21 with the receipt; two dates remain uncertain.” That is an adaptation, not a required form or proven shortcut. Skip the note when an urgent response matters more, and protect confidential information.

Task interrupted: A plan for returning helps you move on

Check a handoff note for usefulness and effort

A tool can reduce distraction while adding another demand. Van Zoonen and Scharp's field experiment followed 50 employees in a Dutch technology consultancy across four days, with 25 in each group. Ready-to-resume plans reduced attention residue and weakened its association with exhaustion, but the intervention group had higher general exhaustion. The authors proposed explanations that require further testing; the study did not show a fatigue remedy. Judge your own brief note by whether it helps and whether keeping it becomes a chore. Simplify or stop it if the burden outweighs the benefit. Findings about unplanned work intrusions do not automatically explain planned rest breaks.

Managing Daily Work Intrusions: An Intervention to Reduce Attention Residue and Exhaustion

Improve the work system as well as the phone setting

If four people need immediate replies through four channels while you are responsible for a demanding task, the conflict belongs in the work design. The Health and Safety Executive's Management Standards address demands such as workload, work patterns and the work environment. A practical discussion can name the highest-priority task, the person covering urgent contact, and the expected reply window for routine questions. Skill, tools, staffing, incentives, health and authority also affect productivity. Protected time is useful only when it fits those responsibilities; the aim is reliable work and care, not accumulating uninterrupted minutes at everyone else's expense.

Management Standards — Demands Cal Newport — Georgetown Center for Digital Ethics

Make a change easy to keep and revise

Choose a result that matches your reason for changing

Different goals need different evidence. If the problem is proofreading errors, count errors; if it is a late bedtime, note when you actually stopped and slept. If it is shared time, ask whether the interaction felt better. Do not use a laboratory attention score or a falling phone total as a substitute for those outcomes. Mark's work studies real activities, while Gazzaley's research measures particular cognitive functions. A smaller screen total can accompany worse access or simply more laptop use. Success means the chosen arrangement served the need you named.

Gloria Mark — UC Irvine expert profile Adam Gazzaley, M.D., Ph.D. — Neuroscape

Keep a light record of purpose, timing and experience

Make the record small enough to use: the task, the change, the result and an important tradeoff. A log can help locate an evening pattern that memory missed, but there is no need to turn every unlock into a judgment. Note whether use was intentional, necessary, enjoyable or a detour and whether sleep, distress or connection changed. A brief unsafe interaction can matter more than hours of useful work. Parry's measurement review supports checking recalled amount; interpretation still needs your context. Keep sensitive messages and other people's information out of the record.

A systematic review and meta-analysis of discrepancies between logged and self-reported digital media use Social Media and Adolescent Health — Chapter 4: Social Media and Adolescent Health

Make the allowed-contact list work in practice

A setting is useful only if the needed contact can still reach you. Apple's Focus guidance permits selected people and apps, with options for calls and repeated calls; settings and available features vary by device and software. Check your device's current instructions, choose the channels your responsibilities require, and test them with a safe ordinary message before relying on the arrangement. Preserve medical, accessibility, caregiving, severe-weather and emergency access unless a safe alternative exists. Restoring a needed route is a sensible adjustment. A focus tool should support your life rather than silently remove a responsibility.

Set up a Focus on iPhone Allow or silence notifications for a Focus on iPhone

Revisit social agreements when people's needs change

A phone-light meal that worked last month may need a different arrangement during illness, travel or a change at work. Ask whether everyone still has access and feels included, whether checks need explaining, and when the agreed interval ends. The restaurant experiment measured distraction and enjoyment, not attachment or character. Radesky's family-media perspective keeps context visible. Revisit the agreement if it excludes someone, interferes with care or leaves the interaction unchanged. A mutual norm is more informative than judging the relationship from a face-down phone or a single necessary check.

Smartphone use undermines enjoyment of face-to-face social interactions Radesky Research — Research Team

Keep the least disruptive change that answers your question

An allowed-contact list, one muted app, a scheduled check, a shorter work interval or more phone distance changes different things. Start with a safe option proportionate to the task and make it easy to end. If blocking an app leads to the same detour on a laptop, the useful lesson concerns the activity or cue rather than the device. Newport and Eyal offer practical frameworks for intentional work and environment design, but no framework establishes a universal focus-block length. Keep, adjust or end the experiment from the result and the responsibilities it affected.

Cal Newport — Georgetown Center for Digital Ethics Nir Eyal Official Site: Articles, Videos, and Newsletter Set up a Focus on iPhone

Use professional ideas for the question they answer

Use work and behavior frameworks as planning tools

Cal Newport's protected-work writing and Nir Eyal's behavioral-design writing make everyday choices easier to describe: reserve time for a demanding task, decide what the tool is for, notice a trigger, and prepare an alternative. Newport is a computer-science professor; Eyal is an author and consultant who previously taught at Stanford. Their public frameworks are not clinical treatments or experimentally established doses of phone-free time. Use a framework to make a plan concrete, then judge the plan by its results. Buying a book, app or workshop is not required for this experiment.

Cal Newport — Georgetown Center for Digital Ethics Cal Newport — author website Nir Eyal Official Site: Articles, Videos, and Newsletter

Include platform design in the explanation

Tristan Harris and the Center for Humane Technology draw attention to platform incentives and design features, such as infinite scrolling and attention-grabbing notifications. This is a design and policy perspective, not proof that every person is harmed or a clinical diagnosis. It gives a useful reason to look beyond willpower: a feed without a natural stopping point creates a different experience from opening a message and finishing a reply. Look for the feature that competes with your intention and choose a specific boundary around it. Responsibility also belongs to designers, organizations and communication norms.

Tristan Harris — Center for Humane Technology The CHT Perspective

Check the exact evidence behind attention-training promises

Jha studies attention and mindfulness-based training, while Gazzaley develops and evaluates technology-based cognitive interventions. Their research leaves room for useful training while requiring a precise question: which program, which people, which outcome and what comparison? Improvement on one test does not establish improved work, sleep or every attention problem. Gazzaley also has disclosed commercial and investment roles connected to technology. These fields offer questions to investigate, not a reason to buy a generic brain-training product or regard a popular practice as guaranteed treatment.

The Jha Lab — Exploring Attention and Working Memory Adam Gazzaley, M.D., Ph.D. — Neuroscape

Protect safety and know when to get help

Stop safely before using the phone during a hazardous task

NHTSA says safe driving requires your full attention; phone conversation and texting can both divert it. David Strayer's research also examines cognitive distraction in vehicles, so hands-free access should not be treated as an all-clear. Never text, call, scroll or adjust a phone while driving, cycling in traffic, operating machinery or tools, working at heights, or doing another safety-critical task. Stop in a safe place first and follow local and workplace rules. Personal comparisons of desk-task focus do not belong in hazardous situations. Keep emergency access available through a safe arrangement rather than handling the device during the task.

Distracted Driving David Strayer, Ph.D. — University of Utah Up to 27 seconds of inattention after talking to your car or smart phone

Bring persistent or sudden attention changes to qualified care

Occasional distraction is common. NIMH distinguishes adult ADHD by symptoms that are frequent, persistent, impair daily life and occur across situations, with a developmental history considered in assessment. A screen-time total cannot establish that pattern. Persistent attention or organization trouble across settings, or a sudden change with sleep, mood, medication, substance use, illness or injury, deserves qualified assessment. Describe when it began, where it occurs and what became harder. Health, environment and responsibilities may all matter. Do not start, stop or change prescribed medication from this article; discuss treatment questions with the prescriber. Attention experiments can support understanding without replacing care.

ADHD in Adults: 4 Things to Know My Mental Health: Do I Need Help?

Get immediate help when you cannot stay safe

If you may harm yourself or cannot stay safe, get immediate help rather than waiting for a phone experiment to work. In the United States, call or text 988 for crisis support, or call 911 for a life-threatening emergency. Elsewhere, use local emergency or crisis services. NIMH also advises professional help for severe or persistent symptoms that affect functioning. This is general education, not a diagnosis or treatment plan. Named sources. Honest paraphrase of the finding. Not medical, legal, or financial advice.

My Mental Health: Do I Need Help?

Try one change around one real task

These are practical adaptations of the evidence, not a course, a required regimen or a test of your character.

Protect one important task and keep essential access

Choose one upcoming task and one outcome: finishing a draft, catching errors, remembering a paragraph or enjoying a conversation. Write what contact must remain available. Change one optional interruption for that task through an allowed-contact list, a muted channel, a scheduled check or safe phone distance. At the end, note the result, strain and anything important you missed. Keep, adjust or end the change. This small comparison cannot prove a general cause, but it can show whether the arrangement is worth using again. For community discussion about phones and a quieter week, see STUDself at /self/.

The attentional cost of receiving a cell phone notification Set up a Focus on iPhone Gloria Mark — UC Irvine expert profile

Try one optional channel with a suitable check time

Keep required work, medical, accessibility, caregiving, severe-weather and emergency routes open. Pick one optional channel that interrupts a suitable stationary task and decide when it is reasonable to check it. The batching study makes scheduling a useful question, but its exact schedule is not a prescription. After the task, compare completion and missed contact with your usual arrangement. Restore access if the cost of waiting was higher than expected. A less intrusive change can be successful even if the daily screen total barely changes.

Batching smartphone notifications can improve well-being Set up a Focus on iPhone

Try a workable handoff from evening use to sleep

For several nights, identify the activity that usually carries you past your intended bedtime and give it a stopping point. Prepare a simple alternative, such as putting the next morning's things in place, without removing needed phone access. Note bedtime, sleep and whether the transition was workable; change the plan if it simply shifts the delay elsewhere. The bedtime pilot supplies bounded evidence, not a rule for every bedroom. The Sleep topic provides further reading, and persistent sleep or mood problems deserve qualified care.

Effect of restricting bedtime mobile phone use on sleep, arousal, mood, and working memory: A randomized pilot trial Nir Eyal Official Site: Articles, Videos, and Newsletter My Mental Health: Do I Need Help?

010

Check common focus claims

Use these concise verdicts alongside the fuller explanations above. A useful claim says what was measured and leaves room for the limits of the finding.

Protect demanding tasks around switches

Claim: Switching between tasks can carry a performance cost. Verdict: established for studied task-switching conditions. The size and practical meaning depend on the task, preparation and measure; there is no universal workday penalty.

Control and interference in task switching—A review

Use interruption findings within their measured limits

Claim: Every interruption costs about 23 minutes. Verdict: not supported. Elapsed time before returning to a work sphere includes intervening activity; it is not a universal cognitive recovery period.

No Task Left Behind? Examining the Nature of Fragmented Work

Judge multitasking by the task and result

Claim: People who media multitask are generally worse at attention. Verdict: not established as a general rule. The pooled association is small, varies across measures and leaves causality unresolved.

“Cognitive control in media multitaskers” ten years on: A meta-analysis

Test phone placement and preserve needed access

Claim: A phone on the desk always drains your brain. Verdict: not supported. Reviews find limited, outcome-specific effects and methodological uncertainty; they do not establish harm on every task.

Does the Mere Presence of a Smartphone Impact Cognitive Performance? A Meta-Analysis of the “Brain Drain Effect”Does the Brain Drain Effect Really Exist? A Meta-Analysis

Evaluate digital breaks without a reset claim

Claim: A dopamine detox resets the brain. Verdict: not supported. A change in urges or behavior is not evidence that dopamine was depleted or reset on a fixed timer.

Liking, Wanting and the Incentive-Sensitization Theory of Addiction

Pair media amount with experience and context

Claim: More screen time proves social media caused poor mental health. Verdict: not supported by duration alone. The National Academies' adolescent review did not establish population-level causality; specific harms still require attention.

Social Media and Adolescent Health — Chapter 4: Social Media and Adolescent Health

Balance quieter alerts with staying informed

Claim: Turning off all notifications always feels better. Verdict: not supported. The no-notification group in Fitz and colleagues' trial had more anxiety and fear of missing out; even the three-batch group experienced some increased fear of missing notifications.

Batching smartphone notifications can improve well-being

References for this topic

Sources and context

The Jha Lab — Exploring Attention and Working Memory ↗
id
attention--jha-lab — The Jha Lab — Exploring Attention and Working Memory
kind
professional
accessed at
2026-10-01
supports
Attention/working-memory/mindfulness research and public talks, book and podcast links; university affiliation.
limitations
Lab site opened. Miami faculty HTML also retrieved directly to verify Professor of Psychology role; no claim that one duration or program universally works.
original id
jha-lab
Amishi Jha — University of Miami faculty profile ↗
id
attention--jha-profile — Amishi Jha — University of Miami faculty profile
kind
professional
accessed at
2026-10-01
supports
Official biography states psychology professor, Director of Contemplative Neuroscience and psychology PhD; lab/public work context.
limitations
The official faculty biography was reviewed. Appointment verification does not establish a training program’s efficacy.
original id
jha-profile
How working memory gets you through the day ↗
id
attention--miller-working-memory — How working memory gets you through the day
kind
official
accessed at
2026-10-01
supports
Working memory as information maintained and used for ongoing thought/action; Miller's neural account.
limitations
Official university research explanation; not a personal capacity score or a universal training prescription.
original id
miller-working-memory
Control and interference in task switching—A review ↗
id
attention--kiesel-switching — Control and interference in task switching—A review
kind
review
accessed at
2026-10-01
supports
Task preparation and interference; variable task-switching response-time/error costs.
limitations
The PubMed abstract and full author-uploaded review were inspected. Laboratory tasks do not establish a universal recovery time after an interruption.
original id
kiesel-switching
“Cognitive control in media multitaskers” ten years on: A meta-analysis ↗
id
attention--parry-multitasking — “Cognitive control in media multitaskers” ten years on: A meta-analysis
kind
review
accessed at
2026-10-01
supports
118 assessments; small pooled association with measurement/outcome variation and unresolved causality.
limitations
Full journal text inspected; most assessments involved students; habitual media multitasking differs from immediate task competition.
original id
parry-multitasking
An Opportunity Cost Framework of Digital Well-Being ↗
id
attention--kushlev-opportunity — An Opportunity Cost Framework of Digital Well-Being
kind
professional
accessed at
2026-10-01
supports
2026 theoretical framework distinguishes displacement, substitution and interference and compares use with available alternatives.
limitations
Journal full text opened. A conceptual synthesis, not a validated diagnostic tool, causal estimate or tested personal regimen.
original id
kushlev-opportunity
A systematic review and meta-analysis of discrepancies between logged and self-reported digital media use ↗
id
attention--parry-logs — A systematic review and meta-analysis of discrepancies between logged and self-reported digital media use
kind
review
accessed at
2026-10-01
supports
Preregistered synthesis of 106 effect sizes; moderate correspondence and inaccurate amount estimates; weaker problematic-use correspondence.
limitations
University-hosted accepted manuscript opened. Neither self-report nor logs establish the purpose, individual harm or diagnosis.
original id
parry-logs
Nir Eyal Official Site: Articles, Videos, and Newsletter ↗
id
attention--eyal-profile — Nir Eyal Official Site: Articles, Videos, and Newsletter
kind
professional
accessed at
2026-10-01
supports
Author/consultant, former Stanford teaching, behavioral-design books and public education.
limitations
Official biography opened; commercial frameworks and affiliate activity, not clinician or experimental efficacy evidence.
original id
eyal-profile
No Task Left Behind? Examining the Nature of Fragmented Work ↗
id
attention--mark-fragmentation — No Task Left Behind? Examining the Nature of Fragmented Work
kind
study
accessed at
2026-10-01
supports
Observation of 24 information workers; work-sphere fragmentation and resumption with intervening activities.
limitations
Small observational workplace sample; elapsed resumption time is not experimentally measured cognitive recovery from a ping.
original id
mark-fragmentation
Management Standards — Demands ↗
id
attention--hse-demands — Management Standards — Demands
kind
guideline
accessed at
2026-10-01
supports
Workload, work patterns and environment are organizational stress-management concerns.
limitations
Official UK workplace guidance opened; no universal schedule and no legal advice about a particular employer.
original id
hse-demands
Effect of restricting bedtime mobile phone use on sleep, arousal, mood, and working memory: A randomized pilot trial ↗
id
attention--he-bedtime — Effect of restricting bedtime mobile phone use on sleep, arousal, mood, and working memory: A randomized pilot trial
kind
study
accessed at
2026-10-01
supports
38 randomized participants; four-week intervention, 30-minute pre-bed restriction; improved selected sleep/arousal outcomes.
limitations
Full journal article opened. Small selected sample with poor sleep and substantial bedtime use; intervention cannot isolate a single mechanism or establish a universal rule.
original id
he-bedtime
Set up a Focus on iPhone ↗
id
attention--apple-focus — Set up a Focus on iPhone
kind
official
accessed at
2026-10-01
supports
Selected people and apps, schedules and filters; configuration can preserve needed contact. Call options verified on linked apple-allow guidance.
limitations
Official current user guide opened; device/version dependent. Feature availability is not evidence of health or productivity benefit.
original id
apple-focus
Smartphone use undermines enjoyment of face-to-face social interactions ↗
id
attention--dwyer-meals — Smartphone use undermines enjoyment of face-to-face social interactions
kind
study
accessed at
2026-10-01
supports
Restaurant field experiment and experience sampling; distraction and enjoyment under studied phone-use conditions.
limitations
Author-hosted manuscript opened; situational average differences do not establish attachment, character or every relationship's needs.
original id
dwyer-meals
Radesky Research — Research Team ↗
id
attention--radesky-profile — Radesky Research — Research Team
kind
professional
accessed at
2026-10-01
supports
Jenny Radesky MD, pediatric associate professor and developmental-behavioral division director.
limitations
Official lab team opened; pediatric role does not establish effects in all adults.
original id
radesky-profile
Control and Interference in Task Switching—A Review — author-uploaded full text ↗
id
attention--kiesel-full — Control and Interference in Task Switching—A Review — author-uploaded full text
kind
review
accessed at
2026-10-01
supports
Full author text describes slower responses and increased errors after rule switches, preparation and differing paradigms.
limitations
Author-uploaded publication inspected; same work as kiesel-switching, not an independent corroborating study.
original id
kiesel-full
The attentional cost of receiving a cell phone notification ↗
id
attention--stothart-notifications — The attentional cost of receiving a cell phone notification
kind
study
accessed at
2026-10-01
supports
Notifications disrupted the studied attention task without direct phone interaction.
limitations
Abstract inspected; one laboratory task does not establish equal costs for all everyday alerts.
original id
stothart-notifications
Batching smartphone notifications can improve well-being ↗
id
attention--fitz-batching — Batching smartphone notifications can improve well-being
kind
study
accessed at
2026-10-01
supports
Four conditions, 237 completing participants in India; three daily batches improved several self-reported outcomes and reduced unlocks while increasing notification FoMO. No-notification delivery increased anxiety.
limitations
Published author-hosted PDF methods, Table 2 and results inspected. Multiple exploratory comparisons, self-reported productivity, context-specific sample; hourly batching showed few benefits.
original id
fitz-batching
Daria Kuss — Nottingham Trent University ↗
id
attention--kuss-profile — Daria Kuss — Nottingham Trent University
kind
professional
accessed at
2026-10-01
supports
Chartered psychologist/scientist, psychology associate professor, cyberpsychology and addictive-behavior research, public dissemination.
limitations
Official profile opened; screen time, urges and an online checklist cannot diagnose a disorder.
original id
kuss-profile
Blocking mobile internet on smartphones improves sustained attention, mental health, and subjective well-being ↗
id
attention--castelo-blocking — Blocking mobile internet on smartphones improves sustained attention, mental health, and subjective well-being
kind
study
accessed at
2026-10-01
supports
Preregistered randomized timing of two-week block, 467 unique participants; objective sustained-attention improvement, calls/texts preserved; 119 compliant.
limitations
The full primary article was reviewed. Primary repeated-measures intention-to-treat analyses used complete cases; attrition, low compliance and possible expectancy effects limit interpretation. The study does not establish equivalence with clinical treatment.
original id
castelo-blocking
Does the Mere Presence of a Smartphone Impact Cognitive Performance? A Meta-Analysis of the “Brain Drain Effect” ↗
id
attention--parry-presence — Does the Mere Presence of a Smartphone Impact Cognitive Performance? A Meta-Analysis of the “Brain Drain Effect”
kind
review
accessed at
2026-10-01
supports
University-hosted abstract reports 56 studies, 7,093 participants; only working-memory pooled effect significant; other functions null.
limitations
Official abstract inspected, not full publisher article; heterogeneity and poor statistical power limit interpretation.
original id
parry-presence
Does the Brain Drain Effect Really Exist? A Meta-Analysis ↗
id
attention--bottger-presence — Does the Brain Drain Effect Really Exist? A Meta-Analysis
kind
review
accessed at
2026-10-01
supports
22 studies, 43 effects; overall g −0.14, memory −0.23, attention −0.07 nonsignificant; heterogeneous presence/use comparisons.
limitations
The full article was reviewed. Its scope differs from Parry’s review, and the pooled standardized effects are not percentages of brainpower.
original id
bottger-presence
Time-Specific Digital Detox Interventions: Effects and Effectiveness Among College Students ↗
id
attention--king-timed-breaks — Time-Specific Digital Detox Interventions: Effects and Effectiveness Among College Students
kind
study
accessed at
2026-10-01
supports
In this 2025 primary paper, 640 college students were randomized to control or 30-minute daily no-screen intervals. The seven-day daily-affect comparison was null, compliance was difficult, and 632 participants entered the analysis.
limitations
Full publisher-hosted PDF opened; brief college experiment with self-reported compliance. Actual-practice associations are not equivalent to the randomized main comparison.
original id
king-timed-breaks
Liking, Wanting and the Incentive-Sensitization Theory of Addiction ↗
id
attention--berridge-reward — Liking, Wanting and the Incentive-Sensitization Theory of Addiction
kind
review
accessed at
2026-10-01
supports
Reward-related wanting and liking involve separable mechanisms; addiction is more complex than a pleasure reservoir.
limitations
Full author manuscript opened. Addiction neuroscience does not validate a short dopamine reset protocol for ordinary phone use.
original id
berridge-reward
Anna Lembke, MD — Stanford Profiles ↗
id
attention--lembke-profile — Anna Lembke, MD — Stanford Profiles
kind
professional
accessed at
2026-10-01
supports
Stanford professor and Medical Director of Addiction Medicine; public book/documentary education.
limitations
Official biography and appointments opened; clinical expertise does not establish addiction in ordinary phone users or a dopamine reset timer.
original id
lembke-profile
Social Media and Adolescent Health — Chapter 4: Social Media and Adolescent Health ↗
id
attention--nasem-adolescents — Social Media and Adolescent Health — Chapter 4: Social Media and Adolescent Health
kind
review
accessed at
2026-10-01
supports
Reviewed committee analysis: insufficient support for population-level causality; differentiated benefits, harms and experiences.
limitations
Chapter text inspected; narrative committee synthesis rather than a systematic review; adolescent scope cannot be generalized to every adult.
original id
nasem-adolescents
Task interrupted: A plan for returning helps you move on ↗
id
attention--leroy-resume — Task interrupted: A plan for returning helps you move on
kind
official
accessed at
2026-10-01
supports
University account of Leroy and Glomb's four studies, attention residue and ready-to-resume planning improving interrupting-task performance.
limitations
University research account inspected, not full journal article; explicitly states return performance on the original task was not tested.
original id
leroy-resume
Managing Daily Work Intrusions: An Intervention to Reduce Attention Residue and Exhaustion ↗
id
attention--vanzoonen-intrusions — Managing Daily Work Intrusions: An Intervention to Reduce Attention Residue and Exhaustion
kind
study
accessed at
2026-10-01
supports
Author-uploaded manuscript methods/results: 50 employees, four days, reduced residue but increased general exhaustion; weakened residue/exhaustion association.
limitations
The full author manuscript was inspected. This short Dutch consultancy study had attrition and does not establish fatigue relief or effects of planned breaks.
original id
vanzoonen-intrusions
Cal Newport — Georgetown Center for Digital Ethics ↗
id
attention--newport-profile — Cal Newport — Georgetown Center for Digital Ethics
kind
professional
accessed at
2026-10-01
supports
Provost's Distinguished Professor of Computer Science; field verified separately from author work.
limitations
Official appointment page opened; computer-science role is not attention-science or clinical credential.
original id
newport-profile
Gloria Mark — UC Irvine expert profile ↗
id
attention--mark-profile — Gloria Mark — UC Irvine expert profile
kind
professional
accessed at
2026-10-01
supports
Role, psychology PhD, real-world media/attention research and public media work.
limitations
Official profile verifies professional scope, not each claim in media coverage.
original id
mark-profile
Adam Gazzaley, M.D., Ph.D. — Neuroscape ↗
id
attention--gazzaley-profile — Adam Gazzaley, M.D., Ph.D. — Neuroscape
kind
professional
accessed at
2026-10-01
supports
UCSF distinguished professor, Neuroscape founder, cognitive interventions and disclosed commercial/investment roles.
limitations
Official profile opened; intervention evidence is program/population/outcome specific and commercial interests matter.
original id
gazzaley-profile
Allow or silence notifications for a Focus on iPhone ↗
id
attention--apple-allow — Allow or silence notifications for a Focus on iPhone
kind
official
accessed at
2026-10-01
supports
People/app notification controls and call/repeated-call options.
limitations
Official linked guide opened; configuration is version dependent and should be tested with needed contacts.
original id
apple-allow
Cal Newport — author website ↗
id
attention--newport-public — Cal Newport — author website
kind
professional
accessed at
2026-10-01
supports
Public work, books and newsletter translating intentional work and digital practices.
limitations
Official author site opened; commercial educational framework, not clinical evidence.
original id
newport-public
Tristan Harris — Center for Humane Technology ↗
id
attention--harris-profile — Tristan Harris — Center for Humane Technology
kind
professional
accessed at
2026-10-01
supports
Co-founder/president, former Google design ethicist, documentary, podcast and policy communication.
limitations
Official organization profile opened; advocacy is distinct from diagnosis or clinical intervention research.
original id
harris-profile
The CHT Perspective ↗
id
attention--cht-design — The CHT Perspective
kind
professional
accessed at
2026-10-01
supports
Design advocacy identifies infinite scrolling, algorithmic curation and notifications as attention-related design features.
limitations
Official advocacy text opened; policy/design lens, not an individual causal health estimate.
original id
cht-design
Distracted Driving ↗
id
attention--nhtsa-safety — Distracted Driving
kind
official
accessed at
2026-10-01
supports
Driving requires full attention; calls, texting and device adjustment create safety risks.
limitations
Official guidance opened; local laws vary. Other safety-critical settings retain the approved precaution, rather than a claim that NHTSA directly studied them.
original id
nhtsa-safety
David Strayer, Ph.D. — University of Utah ↗
id
attention--strayer-profile — David Strayer, Ph.D. — University of Utah
kind
professional
accessed at
2026-10-01
supports
Cognition and neural science professor, psychology PhD, attention/performance and vehicle-distraction work.
limitations
Official profile opened; safety-critical driving evidence differs from desk-task experiments.
original id
strayer-profile
Up to 27 seconds of inattention after talking to your car or smart phone ↗
id
attention--strayer-public — Up to 27 seconds of inattention after talking to your car or smart phone
kind
official
accessed at
2026-10-01
supports
Official university account makes Strayer's hands-free cognitive-distraction research publicly useful.
limitations
University study account opened; particular tested systems/settings, not a universal recovery timer and no desk-task rule.
original id
strayer-public
ADHD in Adults: 4 Things to Know ↗
id
attention--nimh-adhd — ADHD in Adults: 4 Things to Know
kind
guideline
accessed at
2026-10-01
supports
Persistent impairing symptoms across situations, developmental history and qualified assessment; ordinary distraction differs.
limitations
Official public guidance opened; educational, not individual diagnosis or medication instruction.
original id
nimh-adhd
My Mental Health: Do I Need Help? ↗
id
attention--nimh-help — My Mental Health: Do I Need Help?
kind
guideline
accessed at
2026-10-01
supports
Severe/persistent functioning changes warrant care; immediate self-harm support via 988 and life-threatening emergencies via 911 in U.S.
limitations
Official guidance opened; general triage, U.S. routes; sudden-change and prescriber language also preserves the approved original safety boundary.
original id
nimh-help
Radesky Research — News & Pubs ↗
id
attention--radesky-public — Radesky Research — News & Pubs
kind
professional
accessed at
2026-10-01
supports
Official lab documents family-media education, research dissemination and public media coverage.
limitations
Official news/publications and About pages opened; public usefulness is not proof of a particular intervention.
original id
radesky-public
I don't think screen time is the enemy ↗
id
attention--question-purpose — I don't think screen time is the enemy
kind
question_signal
accessed at
2026-10-01
supports
Reader question about intentional use versus an unwanted total; relevance only.
limitations
Post/thread opened; self-selected personal discussion supplies no factual or clinical authority.
original id
question-purpose
Sophie Leroy — UW Bothell faculty profile ↗
id
attention--leroy-profile — Sophie Leroy — UW Bothell faculty profile
kind
professional
accessed at
2026-10-01
supports
Management professor, Business dean, attention-residue research and public research explanation.
limitations
The official profile verifies the role and research context. It does not establish a universal resumption timer.
original id
leroy-profile
Earl K. Miller — MIT Picower Institute ↗
id
attention--miller-profile — Earl K. Miller — MIT Picower Institute
kind
professional
accessed at
2026-10-01
supports
Picower Professor of Neuroscience; cognitive control and working-memory research.
limitations
The official faculty profile was reviewed. Public neuroscience explanations do not supply a productivity formula.
original id
miller-profile
Douglas Parry — Vrije Universiteit Amsterdam ↗
id
attention--parry-profile — Douglas Parry — Vrije Universiteit Amsterdam
kind
professional
accessed at
2026-10-01
supports
Communication Science assistant professor, PhD, digital-media measurement, cognition and open-science work.
limitations
Official profile opened; synthesis inherits limits of included measurements and populations.
original id
parry-profile
Bio — Kostadin Kushlev Ph.D. ↗
id
attention--kushlev-profile — Bio — Kostadin Kushlev Ph.D.
kind
professional
accessed at
2026-10-01
supports
Georgetown psychology associate professor, Happy Tech Lab leadership and public digital-well-being research.
limitations
Official biography opened; public relevance does not establish a universal notification or phone rule.
original id
kushlev-profile
Adrian Ward — UT Experts ↗
id
attention--ward-profile — Adrian Ward — UT Experts
kind
professional
accessed at
2026-10-01
supports
UT Austin marketing associate professor, psychology PhD, technology/cognition research and media translation.
limitations
Official profile opened; prominent original phone-presence findings require later synthesis and replication context.
original id
ward-profile

Professional perspectives

Gloria Mark
PhD in psychology; UC Irvine Chancellor's Professor of Informatics
Public usefulness
Official profile documents broad media coverage and public talks translating real-world multitasking.
Contribution
Separate fragmented work, resumption, attention and stress from a fixed cognitive recovery timer.
Scope and limits
Small field observations and public summaries do not establish one attention span, recovery time or optimal block.
Reviewed
2026-10-01
Sophie Leroy
PhD; Professor of Management and Dean, UW Bothell School of Business
Public usefulness
Official faculty research explanation and UW News account make attention residue and ready-to-resume planning understandable.
Contribution
Explain lingering thoughts after switching and assess a short return cue without promising faster later resumption.
Scope and limits
The 2018 studies did not test original-task performance after return; later field findings include effort costs.
Reviewed
2026-10-01
Earl K. Miller
MIT Picower Professor of Neuroscience; Professor of Brain and Cognitive Sciences
Public usefulness
Opened MIT News and institute research pages translate working memory and cognitive control for a general reader.
Contribution
Define information held and used during demanding thought, keeping exact cognitive tasks visible.
Scope and limits
Neural mechanisms do not supply a universal productivity penalty, personal diagnosis or phone-free dose.
Reviewed
2026-10-01
Amishi Jha
PhD; Professor of Psychology and Director of Contemplative Neuroscience, University of Miami
Public usefulness
Lab website documents Peak Mind, public interviews, podcasts and talks about attention and training.
Contribution
Distinguish attention and working memory and ask which training program helps which population and outcome.
Scope and limits
Military, professional and other program findings do not create a guaranteed universal mindfulness treatment.
Reviewed
2026-10-01
Adam Gazzaley
MD, PhD; UCSF David Dolby Distinguished Professor; Neuroscape Founder and Executive Director
Public usefulness
Official biography documents public cognitive-science translation, books, talks and technology-intervention research.
Contribution
Keep cognitive-control measures, aging and tested interventions distinct from generic brain-training promises.
Scope and limits
Program/population specificity and disclosed technology-company and investment interests require attention.
Reviewed
2026-10-01
David Strayer
PhD in psychology; University of Utah Professor, Cognition and Neural Science
Public usefulness
Official university public study account and Applied Cognition Lab explain hands-free vehicle distraction and its policy relevance.
Contribution
Keep hazardous tasks in a stricter safety category than stationary personal focus experiments.
Scope and limits
Driving research does not establish an optimal phone position for every desk task or replace local safety rules.
Reviewed
2026-10-01
Douglas Parry
PhD in Socio-Informatics; Communication Science Assistant Professor, Vrije Universiteit Amsterdam
Public usefulness
Accessible reviews address public questions about screen totals, media multitasking and phone-presence headlines.
Contribution
Compare logs with remembered use and teach how outcome and measurement differences limit broad claims.
Scope and limits
Meta-analysis cannot resolve all causal mechanisms, personal motives, clinical impairment or the best individual control.
Reviewed
2026-10-01
Kostadin Kushlev
PhD; Georgetown Associate Professor of Psychology and Happy Tech Lab director
Public usefulness
Official research pages frame accessible questions about batching, digital breaks and everyday digital well-being.
Contribution
Teach notification tradeoffs and distinguish what phone use adds, replaces and interrupts.
Scope and limits
Notification outcomes differ across schedules and contexts; opportunity-cost framework is conceptual rather than a validated regimen.
Reviewed
2026-10-01
Adrian F. Ward
PhD in psychology; Associate Professor of Marketing, University of Texas at Austin
Public usefulness
Official biography documents public coverage and teaching about the psychology of technology.
Contribution
Connect original phone-presence questions with later reviews and the specific mobile-internet block trial.
Scope and limits
Mixed presence evidence and demanding intervention methods prevent an always-harmful phone-placement rule.
Reviewed
2026-10-01
Daria Kuss
PhD; Chartered Psychologist and Chartered Scientist; Nottingham Trent Associate Professor in Psychology
Public usefulness
Official profile documents media education, cyberpsychology books and professional/government engagement.
Contribution
Keep ordinary use, unwanted repeated behavior, distress and diagnosable conditions distinct.
Scope and limits
No duration, urge or public checklist is sufficient to diagnose addiction or select treatment.
Reviewed
2026-10-01
Jenny Radesky
MD; University of Michigan Associate Professor of Pediatrics; Developmental Behavioral Pediatrics division director
Public usefulness
Official family-media research and professional pediatric education explain development, context and digital design.
Contribution
Ask what young people see, do and need online rather than relying on duration alone.
Scope and limits
Pediatric and family evidence cannot be generalized to every adult or used to diagnose one child.
Reviewed
2026-10-01
Cal Newport
Georgetown Provost's Distinguished Professor of Computer Science; public work/digital-practice author
Public usefulness
Official author site and books make protected work and intentional tool choice accessible to broad audiences.
Contribution
Give protected work and communication expectations a concrete planning vocabulary.
Scope and limits
Computer-science appointment and commercial books do not establish a universal scientific focus-block length or clinical treatment.
Reviewed
2026-10-01
Nir Eyal
Behavioral-design author and consultant; former Stanford Graduate School of Business and d.school instructor
Public usefulness
Official site provides public articles and books on habits, triggers, attention and environment design.
Contribution
Notice a trigger, prepare an alternative and make an everyday plan specific enough to review.
Scope and limits
Commercial education, consulting and affiliate activity; not a clinical credential or proof of one effective personal regimen.
Reviewed
2026-10-01
Tristan Harris
Center for Humane Technology co-founder and president; former Google design ethicist
Public usefulness
Official profile documents public policy communication, The Social Dilemma and Your Undivided Attention.
Contribution
Include platform incentives and attention-related design rather than placing the whole burden on user willpower.
Scope and limits
Design advocacy and industry experience do not establish an individual diagnosis, causal health estimate or treatment.
Reviewed
2026-10-01
Anna Lembke
MD; Stanford Professor of Psychiatry and Behavioral Sciences and Medical Director of Addiction Medicine
Public usefulness
Official biography documents Dopamine Nation, public addiction education and documentary participation.
Contribution
Recognize when loss of control, distress and impaired functioning require qualified care.
Scope and limits
Clinical addiction expertise does not make ordinary phone use addiction or establish a short dopamine reset protocol.
Reviewed
2026-10-01

Keep this topic in view

Preserved original record

The earlier public profile is preserved separately from the current article. It may contain superseded wording and is not newly checked material.

Read the full original profile

slug

attention

name

Attention, phones, focus

browse Line

Understand what research says about phones, interruptions, and focus.

photo

/learn/assets/topics/attention.jpg

photo Alt

An adult writing in a notebook with a phone face down on the table

aliases

phone
focus
scroll
notification
distraction

family

work

heat

mid

talk

Sources

most Discussed

true

first Line

Attention is how you select what to focus on and stay with a task while other things compete for notice. Distraction, task switching, phone habits and work demands affect that experience in different ways.

why Line

feel Words

scroll
phone
lose track
feed
finish
interrupt
switch
work

common Picture

lead
Check intention, purpose, and outcome together
why
Begin with one neutral question: “What did I mean to do when I opened the phone?” Opening a device, changing tasks, receiving an alert, and continuing through a feed are different events. Douglas Parry’s measurement work supports comparing device logs with purpose and context, while Daria Kuss’s clinical expertise keeps ordinary use separate from a disorder. Record what happened next and whether sleep, safety, work, connection, or another outcome changed. A repeated detour is useful information for choosing one practical support; a time total by itself cannot explain its meaning or diagnose a person.
lead
Give focused work and responsive work different rules
why
Name which work needs sustained attention and which work must stay responsive, then give each a suitable communication rule. Task-switching research reviewed by Earl Miller and workplace research by Gloria Mark and Sophie Leroy support protecting some demanding work and leaving a clear resumption cue. Caregiving, monitoring, service, operations, collaboration, and accessibility may require planned switching. Cal Newport’s public work can help make protected blocks understandable, while it is a work-design framework rather than a universal scientific dose. Productivity also depends on workload, staffing, clarity, tools, health, skill, and authority, so improve the system as well as the attention setting.
lead
Build a workable handoff from phone time to sleep
why
If phone use is displacing sleep, test a short and realistic stopping point for several nights while preserving alarms, medical tools, accessibility features, caregiving, and emergency contact. A small randomized pilot found benefits after a 30-minute pre-bed restriction in selected college students, so the result supports a bounded experiment rather than a universal bedroom rule. Nir Eyal and Anna Lembke bring different public perspectives on triggers, urges, and planned alternatives; their books and frameworks do not establish one sleep mechanism or diagnose addiction. Track bedtime, sleep, and whether the plan fit real life, then use the separate Sleep topic or a qualified clinician for persistent trouble.
lead
Agree on phone access during shared time
why
Make the norm explicit and mutual: decide which contacts or alerts remain available, how someone will name a necessary check, and when a phone-light interval would help. Kostadin Kushlev’s social-interaction research found modest average differences in distraction and enjoyment in a restaurant experiment, while Jenny Radesky’s family-media work keeps age, design, and family context visible. Accessibility, caregiving, work, culture, communication style, and safety can all require access. Judge the agreement by consent and the people’s experience over time; one visible phone cannot reveal care, attachment, or relationship quality.

situation Quick Answers

- label
  Ask first
  value
  “What did I mean to do when I opened the phone?”
- label
  Compare
  value
  Record what happened next and its effect on sleep, work, safety, or connection; time totals alone do not explain it.
- label
  Focused work
  value
  Protect a suitable block and leave a clear cue for where to resume.
- label
  Responsive work
  value
  Plan the switching and communication that caregiving, service, monitoring, or collaboration requires.
- label
  A useful experiment
  value
  If phone use delays sleep, test a realistic stopping point for several nights and record the result.
- label
  Keep essential access
  value
  Preserve alarms, medical and accessibility tools, caregiving, and emergency contact.
- label
  Agree together
  value
  Decide which alerts stay available, how to name a necessary check, and when a phone-light interval would help.
- label
  Review the fit
  value
  Judge the agreement by consent and everyone’s experience over time.

picture Lead

Check intention, purpose, and outcome together

watch For

This is general education, not a diagnosis or treatment plan. Never text, call, scroll, or adjust a phone while driving, cycling in traffic, operating machinery or tools, working at heights, or doing another safety-critical task; stop in a safe place first and follow local and workplace rules. Keep medical, accessibility, caregiving, severe-weather, and emergency access unless a safe alternative is in place. Persistent attention or organization problems across settings, or a sudden change with sleep, mood, medication, substance use, illness, or injury, deserve qualified assessment. Do not start, stop, or change prescribed medication from this page. If you may harm yourself or cannot stay safe, call or text 988 in the U.S., call 911 for a life-threatening emergency, or use local emergency or crisis services elsewhere.

what People Say

Name the attention task and the outcome. Attention is the selection and maintenance of task-relevant information. Productivity is an outcome shaped by attention plus the task, workload, staffing, tools, health, skill, incentives, and authority. Gloria Mark, Earl Miller, and Amishi Jha study different parts of attention in real-world, neural, and training contexts; together they reinforce the practical first step: name the event and the outcome. A sustained-attention demand, an interruption, an intentional switch, simultaneous dual-tasking, and extended media use need different questions and supports.
Protect demanding work around task switches. Protect consequential tasks from unnecessary switching when the setting allows it. Laboratory task-switching reviews commonly find slower or less accurate responses immediately after changing task rules, with effects that vary by task similarity, cueing, practice, timing, and measure. Earl Miller explains limited cognitive capacity for public audiences, while Sophie Leroy studies attention residue and a ready-to-resume plan in work settings. Preparation may reduce some costs, so mark the next step before a planned switch and keep responsive routes open where the role requires them.
Configure alerts around the task and essential access. Configure alerts around the task and the real cost of missing contact. A controlled experiment found that calls or text notifications disrupted undergraduate performance on one sustained-attention task even without phone interaction. Kostadin Kushlev’s notification and well-being research adds a practical batching perspective, while David Strayer’s driving research establishes a much stricter safety boundary. Preserve emergency, medical, accessibility, caregiving, severe-weather, and required work access, then quiet or batch only the nonessential channels that compete with the chosen task.
Pair device logs with purpose and outcomes. Pair device logs with purpose, timing, and outcomes. Douglas Parry’s preregistered meta-analysis found only moderate correspondence between self-reported digital-media duration and logs, rare agreement in amount, and even weaker agreement between problematic-use scales and logs. Logs can improve recall while still missing whether use involved work, navigation, health, accessibility, learning, support, harassment, enjoyment, or a detour. Measure the behavior and the outcome that matters instead of treating one total as a verdict.
Test access changes as reversible experiments. Use access changes as reversible experiments with a defined outcome. A 2025 randomized trial found that blocking mobile internet on smartphones for two weeks improved an objective sustained-attention score and several self-reported outcomes in intention-to-treat analyses; calls, texts, and internet on other devices remained available. Adrian Ward’s technology-and-cognition work and Tristan Harris’s design advocacy keep device and platform design visible. Compliance and attrition limit the trial, so begin with the least disruptive safe change that can answer your question and review what it improved or made harder.
Judge multitasking by the exact task and results. Judge multitasking by the exact activities and results. Douglas Parry’s meta-analysis of 118 assessments found a small pooled association between frequent media multitasking and cognitive control that varied by measurement approach and outcome, with causality unresolved. Earl Miller and Adam Gazzaley explain why overlapping demanding tasks can compete for limited cognitive control, while practiced combinations and monitoring roles differ. For consequential work, compare time, errors, recall, and strain under arrangements you can safely test rather than grading a person from a media-habit score.

disputed Notes

Test phone placement instead of assuming one rule. Treat phone placement as a reversible comparison. Adrian Ward’s original phone-presence work made the question prominent. Douglas Parry’s preregistered synthesis of 56 studies found a small pooled effect only for working memory and null summary effects for the other cognitive functions. Böttger, Poschik, and Zierer’s 2023 meta-analysis of 22 studies and 43 effects found a small overall effect, g = −0.14, and a memory effect, g = −0.23. The attention subgroup was not significant, g = −0.07. Both reviews have heterogeneity and method limits. Same-room distance, screen-down placement, a focus mode, or another-room placement may fit different tasks and access needs. Keep the arrangement that improves the chosen outcome without removing essential access.
Evaluate a digital break by its real effects. Evaluate a digital break by observable effects such as sleep, task completion, distress, connection, or choice. Anna Lembke and Daria Kuss bring clinical expertise about addiction and problematic technology use, while ordinary use, an unwanted repeated behavior, and a clinical disorder remain different. Addiction neuroscience separates wanting from liking and provides no standard “detox” dose or short brain-reset timer. Record urges, relief, boredom, benefits, and tradeoffs in plain language, and bring persistent loss of control with impairment or distress to qualified care.
Ask what young people experience and need. Ask what a young person is doing, seeing, experiencing, and needing online. The National Academies found the evidence insufficient for a population-level conclusion that social media causes changes in adolescent health. Jenny Radesky’s family-centered research highlights design, content, age, development, and context, while Kostadin Kushlev is studying who may benefit or be harmed. Protect against harassment, exploitation, sleep displacement, and harmful content while preserving helpful connection, identity support, creativity, information, and community. Youth guidance should be age-appropriate and collaborative rather than borrowed from adult anecdotes.
Choose the least disruptive control that works. Choose the least disruptive safe control that fits the task. A focus mode, essential-contact allowlist, scheduled check, app limit, same-room distance, another-room placement, shorter work interval, or team communication rule may each help in a different setting. Cal Newport and Nir Eyal offer high-reach work and behavior-design frameworks, while their branded guidance does not create a universal scientific block length, notification rule, or device-free dose. Define the need, test one change, and revise it from results and responsibilities.

talk Notes

Match the attention arrangement to the actual task. Carrying out two practiced actions, alternating between task rules, monitoring a channel, and composing while answering messages create different demands. Earl Miller and Adam Gazzaley make limited cognitive control understandable, while Douglas Parry’s synthesis cautions against turning a media-habit score into a fixed deficit. For a consequential task, compare errors, time, recall, and strain under arrangements you can safely test.
Keep essential alerts available and shape the rest. A notification can disrupt a demanding task, while emergency, severe-weather, medical, accessibility, caregiving, and required work contact may be essential. Kostadin Kushlev’s work makes batching a useful option rather than a command. For one chosen task, try an allowlist, focus mode, quieter device, or scheduled check and include anything important that you missed in the review.
Choose phone distance from access needs and results. The phone-presence literature is mixed and smaller than the strongest headlines suggest. Adrian Ward’s original study raised an important question, and Douglas Parry’s later synthesis narrows what can be claimed. Another room, same-room distance, screen-down placement, a focus mode, or one blocked app can each be tested. Keep the option that protects the task while preserving necessary access.
Use screen time as one clue inside a fuller picture. Device logs can improve recall, while Douglas Parry’s research shows why amount alone remains incomplete. Add purpose, timing, content, choice, distress, sleep, safety, and the outcome that matters. Jenny Radesky’s family-media research and Daria Kuss’s clinical work reinforce the need for context. An hour of navigation, accessibility support, learning, connection, harassment, or unwanted scrolling can have very different meaning.

how People Run It

Protect one important task and keep essential access. Choose one upcoming task that benefits from sustained attention and write one outcome to watch: errors, completion, recall, or strain. Gloria Mark and Sophie Leroy’s work supports making the task and return point explicit; Kostadin Kushlev’s work supports shaping optional alerts. Keep essential contacts and safety alerts available, then change one nonessential interruption for that task only through a focus mode, allowlist, scheduled check, or more distance. Record what happened and anything important you missed. Use the result to keep, adjust, or end the experiment.
Protect one task and keep essential access. Separate essential from optional contact for one chosen task. Keep emergency, medical, accessibility, caregiving, severe-weather, and required work routes; quiet one optional channel or use an allowlist. Kostadin Kushlev’s research supports testing fewer or batched interruptions, while David Strayer’s work keeps safety-critical attention in a different category. Choose a check time that fits the real consequences of waiting, then compare the result with your usual arrangement, including anything important you missed.
Test a workable bedtime boundary. Create a short handoff from evening phone use to sleep for several nights. Nir Eyal’s public work can help identify the trigger and planned alternative, while the small bedtime-phone trial supplies only bounded evidence. Keep the phone accessible when it provides alarms, medical tools, accessibility features, caregiving, or emergency contact; the change can target one app, content type, or time window. Track bedtime, sleep, and whether the plan was workable, then adjust from the pattern.

how People Keep It

Define the outcome before the rule. Define success before changing the device. Fewer errors, completing a named task, sleeping at the intended time, feeling more choice, or enjoying a conversation are different outcomes. Gloria Mark’s work keeps attention and stress visible, while Adrian Ward’s work highlights technology and cognition. A screen-time total can fall while access worsens or computer use rises, so make the score match the reason for the change.
Use logs with context. Use device logs as a memory aid alongside purpose and experience. Douglas Parry’s measurement research supports checking which apps, times, and events occurred, then comparing them with obligations and outcomes. A high total may reflect necessary work, navigation, health, accessibility, learning, or connection; a brief unsafe or distressing interaction can matter more than hours of useful use. Let the log improve the question rather than define the person.
Leave a resumption cue. Leave a clear resumption cue before an expected interruption. Write the next step, save the location, or state what you were about to do before switching. Sophie Leroy’s attention-residue research and ready-to-resume work make this a practical experiment, while task-switching findings supply no universal recovery time. Review whether the cue reduced reconstruction and revise its detail to fit the task. For example, a private note might say: “Checked rows 1–20; next compare row 21 with the receipt; two dates still need checking.” This is an illustrative adaptation, not a required form. Skip note-taking when an urgent response matters more, and judge its usefulness and effort together. In Longer notes, “Judge a handoff note by both focus and effort” explains why lower distraction does not necessarily mean less fatigue.
Make social phone norms mutual. Agree on which contacts stay available, what counts as an urgent check, whether a person will name why they need the device, and when a phone-light interval ends. Kostadin Kushlev’s social-interaction findings and Jenny Radesky’s family-centered research support attending to context and experience. Revisit the agreement when it excludes someone, interferes with care or access, or leaves the interaction unchanged.
Keep controls proportional. And easy to review. Start with the least disruptive safe change that can answer the question, then keep, revise, or end it based on results. Cal Newport, Nir Eyal, and Tristan Harris offer different public lenses on work design, behavior design, and platform incentives; each is a perspective rather than a required regimen. Preserve required alerts, employment and caregiving routes, accessibility tools, and plain descriptions of any discomfort or benefit.

claims Notes

Protect demanding tasks around switches. Claim: “Switching between tasks can carry a performance cost” — established. Laboratory reviews commonly find slower or less accurate responses immediately after a task-rule switch, with size and practical meaning shaped by tasks, timing, preparation, practice, and outcome. Earl Miller explains limited cognitive capacity, and Sophie Leroy’s work supports leaving a ready-to-resume cue. Use that evidence to protect selected demanding work while keeping necessary responsive work available.
Use interruption research within its real limits. Claim: “Every interruption costs about twenty-three minutes” — not what the research found. Gloria Mark and colleagues measured elapsed time before 24 information workers returned to a work sphere during fragmented days. The study supports attention to work resumption, while it did not measure a fixed cognitive recovery period from every ping. Mark the next step and assess the actual return cost for the task in front of you.
Judge multitasking by the task and result. Claim: “People who media multitask are generally worse at attention” — not what the research found. Douglas Parry’s meta-analysis of 118 assessments found a small pooled association that varied by measurement approach and outcome, with causality unresolved. Earl Miller and Adam Gazzaley help explain why overlapping demanding tasks can compete in the moment. Compare time, errors, recall, and strain rather than assigning a stable deficit from a habit score.
Test phone placement and keep what helps. Claim: “A phone on the desk always drains your brain” — not what the research found. Adrian Ward’s original study made phone presence a widely discussed question, while Douglas Parry’s preregistered synthesis found a small pooled working-memory effect, null summary effects for other cognitive functions, and substantial uncertainty. Compare safe placement options and keep the one that helps the chosen task while preserving required access.
Describe urges without a reset claim. Claim: “A dopamine detox resets the brain” — not what the research found. Addiction neuroscience distinguishes wanting from liking and provides no short reset timer for ordinary phone use. Anna Lembke and Daria Kuss bring clinical expertise that helps separate an experiment, an unwanted pattern, and a disorder. Track urges, sleep, function, choice, and distress in plain language, and seek qualified assessment when loss of control is persistent and impairing.
Pair media amount with experience and context. Claim: “More screen time proves that social media caused poor mental health” — not what the research found. The National Academies found the evidence insufficient for a population-level causal conclusion in adolescents. Jenny Radesky and Kostadin Kushlev keep content, activity, design, age, context, benefits, harms, and reciprocal effects visible. Ask what happened online and what outcome changed instead of treating one duration as a causal diagnosis.
Batch alerts for a named task, then restore what you still need. Claim: “Turning off all notifications always feels better” — not what the research found. Fitz and colleagues found that three daily notification batches improved several self-reported outcomes. The no-notification group reported more anxiety and fear of missing out than usual delivery. The study therefore supports testing a suitable schedule, while keeping required medical, caregiving and work alerts available.

deep Dive

Match the tool to the outcome that matters. Laboratory accuracy, response time, an employee’s output, a caregiver’s responsiveness, learning, creativity, and relationship enjoyment are different outcomes. Gloria Mark and Amishi Jha study attention in different settings, and Cal Newport translates protected work for a broad audience. Ask what the task requires, what failure would cost, which contact must remain available, and what result will show whether the change helped. A tool can improve one outcome while making another harder.
Define the attention event before choosing a response. An interruption begins outside the primary task and creates a return problem; an intentional switch is a chosen change in task rules or goals. Dual-tasking involves overlapping tasks, media multitasking describes patterns of using more than one medium, and extended scrolling is time spent in an activity. Earl Miller, Sophie Leroy, and Douglas Parry cover different parts of this landscape. These events can overlap, while evidence about one cannot establish all the others.
Use interruption research within its real limits. Gloria Mark and colleagues observed 24 information workers and measured elapsed time before they returned to a working sphere during highly fragmented days. They did not randomly assign phone pings or measure a fixed cognitive recovery after each interruption. The useful finding is that work in this sample switched often and resumption mattered. Sophie Leroy’s later work makes a next-step note a reasonable test; neither study supplies a universal minute price for every interruption.
Treat phone placement as a personal experiment. Adrian Ward’s original work gave the mere-presence question public reach, while Douglas Parry’s preregistered meta-analysis found a small pooled effect only for working memory and null results for other cognitive functions amid heterogeneous and often underpowered studies. Test same-room placement, screen-down distance, or another room only when safe and practical. Keep the arrangement that helps the chosen task and preserves needed access.
Describe urges and choices without a reset story. Describe urges, choices, and outcomes in plain language. Kent Berridge’s addiction-neuroscience review distinguishes wanting from liking and describes a more complex system than a pleasure tank. Anna Lembke and Daria Kuss bring clinical perspectives on addiction and problematic use, while public analogies must not turn ordinary boredom into withdrawal or a short break into brain treatment. A person can test less access, notice urges or relief, and seek assessment when persistent loss of control causes impairment or distress.
Ask what young people experience, not only how long. Youth social-media guidance needs specific questions. The National Academies found the evidence insufficient for a population-level causal conclusion. Jenny Radesky’s research makes app design, family context, age, and development visible, while Kostadin Kushlev’s current work asks for whom exposure may matter. Address harassment, exploitation, sleep displacement, social comparison, supportive community, creative activity, and other specific experiences directly. Use age-appropriate family and professional guidance instead of making one time total carry every meaning.
Apply the mobile-internet trial within its tested bounds. The study randomized access and included an objective sustained-attention task, which makes it stronger for causality than a simple correlation. Participants volunteered for a demanding intervention, many never set it up, only a minority met the compliance threshold, and expectancy could affect self-report. Adrian Ward was part of the research team, while Tristan Harris’s advocacy explains why access design interests the public. The result supports further testing without selecting the best app limit, focus duration, or rule for another person.
Bring persistent or sudden changes to qualified assessment. Frequent attention or organization problems across settings can reflect ADHD or other health, sleep, mood, medication, substance, or environmental factors; a sudden change after illness or injury needs prompt attention. Adam Gazzaley’s clinical neuroscience, Anna Lembke’s addiction medicine, and Daria Kuss’s cyberpsychology illustrate why the differential question is broader than screen time. A qualified professional considers history, impairment, and alternatives, and prescribed medication decisions remain with the prescriber.
Judge a handoff note by both focus and effort. Thoughts about unfinished work can linger while you handle a new demand; researchers call this attention residue. Sophie Leroy and Theresa Glomb's 2018 studies supported a short resumption plan for performance on the interrupting task. They did not test performance after returning to the original task. A 2025 field study by Ward van Zoonen and Yuri Scharp followed 50 employees for four days: the planning intervention reduced attention residue but increased overall exhaustion. That small, short study does not settle every setting, but it makes burden worth checking. Use a note when it helps, simplify it when it becomes another chore, and keep urgent response first. A handoff is not a promised fatigue remedy.
Choose a notification schedule that fits the task and required contact. Fitz, Kushlev and colleagues compared usual delivery, hourly batches, three daily batches and no notifications in a randomized field experiment. Among 237 completing participants in India, three daily batches improved several self-reported outcomes during the two-week intervention. Higher anxiety and fear of missing out occurred in the no-notification group. Participants could still open apps to check messages. These were reports of attention and productivity, rather than tests of work output. For a practical trial, keep medical, caregiving and work-required alerts available and review whether the schedule helps the task without making necessary contact harder.

related

habits
sleep
anxiety

watch For Long

Good to know. This is general education, not a diagnosis or treatment plan. Never text, call, scroll, or adjust a phone while driving, cycling in traffic, operating machinery or tools, working at heights, or doing another safety-critical task; stop in a safe place first and follow local and workplace rules. Keep medical, accessibility, caregiving, severe-weather, and emergency access unless a safe alternative is in place. Persistent attention or organization problems across settings, or a sudden change with sleep, mood, medication, substance use, illness, or injury, deserve qualified assessment. Do not start, stop, or change prescribed medication from this page. If you may harm yourself or cannot stay safe, call or text 988 in the U.S., call 911 for a life-threatening emergency, or use local emergency or crisis services elsewhere.
Not advice. Named sources. Honest paraphrase of the finding. Not medical, legal, or financial advice.

sources

Gloria Mark, PhD. UCI Chancellor’s Professor of Informatics; real-world attention, interruption, digital-media, mood, and stress research with observational and task-specific limits
Sophie Leroy, PhD. University of Washington Bothell School of Business dean and professor; attention residue, interruptions, task transitions, and ready-to-resume planning with workplace and study limits
Earl K. Miller, PhD. MIT Picower Professor of Neuroscience; cognitive control, working memory, and public multitasking education without a universal productivity formula
Amishi Jha, PhD. University of Miami psychology professor and attention neuroscientist; attention, working memory, and mindfulness training with population, program, and outcome limits
Adam Gazzaley, MD, PhD. UCSF distinguished professor and Neuroscape founder; attention, distractibility, aging, and digital interventions with study-specific and commercial-interest boundaries
David L. Strayer, PhD. University of Utah cognition and neural science professor; attention, performance, and distracted-driving research with safety rules kept separate from desk-task advice
Douglas Parry, PhD. Vrije Universiteit Amsterdam communication-science assistant professor; logged media use, media multitasking, phone presence, and measurement quality
Kostadin Kushlev, PhD. Georgetown psychology associate professor and Happy Tech Lab director; notifications, smartphones, social interaction, and digital well-being with context and population limits
Adrian F. Ward, PhD. University of Texas at Austin marketing associate professor; technology, cognition, phone presence, and mobile-internet interventions with mixed replication and study limits
Daria Kuss, PhD. Nottingham Trent University chartered psychologist and cyberpsychology associate professor; technology use and behavioral-addiction boundaries without diagnosing ordinary use
Jenny Radesky, MD. University of Michigan associate professor of pediatrics and developmental-behavioral pediatrician; child and family digital-media use, design, and development within pediatric scope
Cal Newport, PhD. Georgetown computer-science professor and public author; protected-work and digital-practice frameworks bounded as general-audience guidance rather than attention science or clinical care
Nir Eyal. behavioral-design author, consultant, and former Stanford instructor; trigger, time-planning, and environment frameworks bounded by commercial work and nonclinical scope
Tristan Harris. Center for Humane Technology co-founder and president; attention-economy and humane-design advocacy bounded as design and policy perspective rather than individual clinical evidence
Anna Lembke, MD. Stanford professor and medical director of Addiction Medicine; addiction assessment and treatment boundaries with ordinary digital use kept distinct from a clinical disorder

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name

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kind

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links

label
Source
href
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source Claims

watch For

NHTSA-2026
NIMH-ADHD-2026
NIMH-HELP-2025
STRAYER-ATTENTION-2026
KUSS-ATTENTION-2026
LEMBKE-ATTENTION-2026

situations.drift

PARRY-LOGS-2021
MARK-2005
PARRY-ATTENTION-2026
KUSS-ATTENTION-2026

situations.work

KIESEL-2010
MARK-2005
NIMH-ADHD-2026
MARK-ATTENTION-2026
LEROY-ATTENTION-2026
MILLER-ATTENTION-2026
NEWPORT-ATTENTION-2026

situations.night

HE-2020
NIMH-HELP-2025
EYAL-ATTENTION-2026
LEMBKE-ATTENTION-2026

situations.people

DWYER-2018
PARRY-PRESENCE-2024
KUSHLEV-ATTENTION-2026
RADESKY-ATTENTION-2026

split.established.0

KIESEL-2010
MARK-2005
NIMH-ADHD-2026
MARK-ATTENTION-2026
MILLER-ATTENTION-2026
JHA-ATTENTION-2026

split.established.1

KIESEL-2010
MILLER-ATTENTION-2026
LEROY-ATTENTION-2026

split.established.2

STOTHART-2015
NHTSA-2026
KUSHLEV-ATTENTION-2026
STRAYER-ATTENTION-2026

split.established.3

PARRY-LOGS-2021
PARRY-ATTENTION-2026

split.established.4

CASTELO-2025
WARD-ATTENTION-2026
HARRIS-ATTENTION-2026

split.established.5

PARRY-LEROUX-2021
PARRY-ATTENTION-2026
MILLER-ATTENTION-2026
GAZZALEY-ATTENTION-2026

split.disputed.0

PARRY-PRESENCE-2024
BOTTGER-PRESENCE-2023
WARD-ATTENTION-2026
PARRY-ATTENTION-2026

split.disputed.1

BERRIDGE-ROBINSON-2016
CASTELO-2025
LEMBKE-ATTENTION-2026
KUSS-ATTENTION-2026

split.disputed.2

NASEM-2024
PARRY-LOGS-2021
RADESKY-ATTENTION-2026
KUSHLEV-ATTENTION-2026

split.disputed.3

STOTHART-2015
PARRY-PRESENCE-2024
CASTELO-2025
NEWPORT-ATTENTION-2026
EYAL-ATTENTION-2026

split.talk.0

KIESEL-2010
PARRY-LEROUX-2021
MILLER-ATTENTION-2026
GAZZALEY-ATTENTION-2026
PARRY-ATTENTION-2026

split.talk.1

STOTHART-2015
NHTSA-2026
KUSHLEV-ATTENTION-2026
STRAYER-ATTENTION-2026

split.talk.2

PARRY-PRESENCE-2024
WARD-ATTENTION-2026
PARRY-ATTENTION-2026

split.talk.3

PARRY-LOGS-2021
NASEM-2024
PARRY-ATTENTION-2026
RADESKY-ATTENTION-2026
KUSS-ATTENTION-2026

move

STOTHART-2015
PARRY-PRESENCE-2024
CASTELO-2025
NHTSA-2026
MARK-ATTENTION-2026
LEROY-ATTENTION-2026
KUSHLEV-ATTENTION-2026

try.0

STOTHART-2015
NHTSA-2026
KUSHLEV-ATTENTION-2026
STRAYER-ATTENTION-2026

try.1

HE-2020
NIMH-HELP-2025
EYAL-ATTENTION-2026

keep.0

PARRY-LOGS-2021
CASTELO-2025
MARK-ATTENTION-2026
WARD-ATTENTION-2026

keep.1

PARRY-LOGS-2021
NASEM-2024
PARRY-ATTENTION-2026

keep.2

KIESEL-2010
MARK-2005
LEROY-ATTENTION-2026
LEROY-GLOMB-2018
VANZOONEN-SCHARP-2025

keep.3

DWYER-2018
PARRY-PRESENCE-2024
KUSHLEV-ATTENTION-2026
RADESKY-ATTENTION-2026

keep.4

STOTHART-2015
PARRY-PRESENCE-2024
BERRIDGE-ROBINSON-2016
NHTSA-2026
NEWPORT-ATTENTION-2026
EYAL-ATTENTION-2026
HARRIS-ATTENTION-2026

deep.0

KIESEL-2010
MARK-2005
NIMH-ADHD-2026
MARK-ATTENTION-2026
JHA-ATTENTION-2026
NEWPORT-ATTENTION-2026

deep.1

KIESEL-2010
MARK-2005
PARRY-LEROUX-2021
MILLER-ATTENTION-2026
LEROY-ATTENTION-2026
PARRY-ATTENTION-2026

deep.2

MARK-2005
MARK-ATTENTION-2026
LEROY-ATTENTION-2026

deep.3

PARRY-PRESENCE-2024
WARD-ATTENTION-2026
PARRY-ATTENTION-2026

deep.4

BERRIDGE-ROBINSON-2016
CASTELO-2025
LEMBKE-ATTENTION-2026
KUSS-ATTENTION-2026

deep.5

NASEM-2024
PARRY-LOGS-2021
RADESKY-ATTENTION-2026
KUSHLEV-ATTENTION-2026

deep.6

CASTELO-2025
WARD-ATTENTION-2026
HARRIS-ATTENTION-2026

deep.7

NIMH-ADHD-2026
NIMH-HELP-2025
NHTSA-2026
GAZZALEY-ATTENTION-2026
LEMBKE-ATTENTION-2026
KUSS-ATTENTION-2026

deep.9

FITZ-2019
MARK-ATTENTION-2026
KUSHLEV-ATTENTION-2026
FITZ-2019-CHECKED

deep.8

LEROY-GLOMB-2018
VANZOONEN-SCHARP-2025
LEROY-ATTENTION-2026

claims.0

KIESEL-2010
MILLER-ATTENTION-2026
LEROY-ATTENTION-2026

claims.1

MARK-2005
MARK-ATTENTION-2026
LEROY-ATTENTION-2026

claims.2

PARRY-LEROUX-2021
PARRY-ATTENTION-2026
MILLER-ATTENTION-2026
GAZZALEY-ATTENTION-2026

claims.3

PARRY-PRESENCE-2024
WARD-ATTENTION-2026
PARRY-ATTENTION-2026

claims.4

BERRIDGE-ROBINSON-2016
CASTELO-2025
LEMBKE-ATTENTION-2026
KUSS-ATTENTION-2026

claims.5

NASEM-2024
PARRY-LOGS-2021
RADESKY-ATTENTION-2026
KUSHLEV-ATTENTION-2026

claims.6

FITZ-2019
KUSHLEV-ATTENTION-2026
MARK-ATTENTION-2026
FITZ-2019-CHECKED

source Situation Keys

situations.drift
situations.work
situations.night
situations.people

professional Source Ids

MARK-ATTENTION-2026
LEROY-ATTENTION-2026
MILLER-ATTENTION-2026
JHA-ATTENTION-2026
GAZZALEY-ATTENTION-2026
STRAYER-ATTENTION-2026
PARRY-ATTENTION-2026
KUSHLEV-ATTENTION-2026
WARD-ATTENTION-2026
KUSS-ATTENTION-2026
RADESKY-ATTENTION-2026
NEWPORT-ATTENTION-2026
EYAL-ATTENTION-2026
HARRIS-ATTENTION-2026
LEMBKE-ATTENTION-2026

house Pointers

href
/self/
label
STUDself. Community experiences with phone habits and focus.

positive Guidance

status: DONE
reviewed At: 2026-08-22
professional Count: 15
ledger: learn/docs/sources/attention.md

learn Article

article

format version

presentation

complete-card

overview

sections

id
understanding-attention
role
explanation
title
What attention does during a task
intro
You can understand a distraction more clearly by naming what was happening before the phone entered the picture.
items
- label
  Give attention a clear job
  text
  Reading a difficult paragraph asks you to select its meaning over nearby conversation and keep returning to that meaning as you read. Sustained attention means maintaining that engagement over time. Working memory is the information you hold and use while doing something, such as remembering the beginning of a sentence while interpreting its end. Amishi Jha's attention research and Earl Miller's cognitive neuroscience treat these as related functions, rather than one attention-span score. A missed detail, a forgotten intention and an unfinished task may need different supports. Name the task first: remembering instructions is a more useful target than becoming a permanently focused person.
  source ids
  jha-lab
  jha-profile
  miller-working-memory
- label
  Distinguish a switch, an interruption and a detour
  text
  An intentional switch is a chosen move to a different task. An interruption stops the current task and creates a question about returning to it. Dual-tasking means attempting overlapping activities, while media multitasking describes patterns of using more than one medium. Scrolling for an hour might involve sustained attention to a feed rather than repeated task switches; the concern may be what that hour displaced. The task-switching review by Andrea Kiesel and colleagues and Douglas Parry's media-multitasking review study different questions. For example, silencing a ping addresses an external cue; it does not by itself settle what you do when a hard paragraph makes you want a break.
  source ids
  kiesel-switching
  parry-multitasking
  kushlev-opportunity
- label
  Ask what phone use adds and what it replaces
  text
  A useful phone activity can still compete with another worthwhile activity. Kostadin Kushlev's 2026 opportunity-cost framework separates displacement, substitution and interference: taking time that could go elsewhere, replacing an activity with a digital version, and disrupting an activity while it happens. These are explanatory ideas, not a diagnostic test or a proven formula for a good life. They make the question concrete: did the video call add contact you otherwise lacked, did a feed replace intended sleep, or did messages keep interrupting dinner? The answer depends on the available alternative, not merely whether a screen was involved.
  source ids
  kushlev-opportunity
id
everyday-focus
role
application
title
Choose the situation you want to improve
items
- label
  Give an unplanned scroll a clear stopping point
  text
  You open the phone to reply, then discover that you are reading a feed. Separate the useful reply from the unplanned continuation. Douglas Parry's measurement research shows why a remembered daily total is a shaky description of what occurred; the log can help reconstruct the sequence. Add your original intention and what happened afterward. For a small practical comparison, finish the reply, close that app and return to the activity you named beforehand. That sequence is an editorial example, not a tested treatment. It gives you a specific detour to examine without calling necessary or enjoyable phone use a disorder. Suppose a person opens a message to confirm a pickup time, follows a feed notification and returns to a half-written form much later. The interruption to examine is the optional feed detour, not the necessary pickup message. They try removing that notification while leaving the contact route available, and note where to resume the form before responding. On the next occasion, phone minutes may remain similar because the pickup arrangements genuinely take longer. Yet the person finishes the form without the unrelated detour. Conversely, fewer phone minutes would be a poor result if an essential message was missed. This invented comparison gives the change two checks: did the intended task become easier to complete, and did important communication still work? A usage total alone cannot answer either question or diagnose an attention disorder.
  source ids
  parry-logs
  eyal-profile
- label
  Agree on response expectations before protecting work
  text
  Writing a report and answering an urgent service request are both legitimate work, but they place different demands on attention. Gloria Mark's field research describes fragmented information work, and the UK's Health and Safety Executive treats workload and work patterns as organizational responsibilities. If your role allows it, agree with colleagues which channel means urgent, what can wait, and when you will check it. If your job is monitoring, care, operations or collaboration, planned switching may be essential. A phone setting cannot repair understaffing, unclear priorities or an impossible response standard; those need a conversation about how the work is organized.
  source ids
  mark-fragmentation
  hse-demands
- label
  Make the evening transition serve your sleep
  text
  If phone use keeps pushing bedtime later, target that transition rather than your whole day's screen total. He and colleagues randomized 38 participants, selected for poor sleep and bedtime phone use, to a 30-minute pre-bed restriction or usual behavior for four weeks. Several sleep and arousal outcomes improved, but this small pilot does not prove a universal bedroom rule or isolate light from content, time displacement and expectation. Choose a workable stopping point for several nights and note bedtime and sleep. Preserve alarms, health tools, accessibility, caregiving and emergency contact; a change to one app can be more practical than removing the device.
  source ids
  he-bedtime
  apple-focus
- label
  Make shared phone time an agreement
  text
  At dinner, one person may be waiting for a care-related call while another is hoping for uninterrupted conversation. In Dwyer, Kushlev and Dunn's restaurant experiment, the phone-available group reported more distraction and less enjoyment on average; that finding concerns an experience in a setting, not the meaning of every visible phone. Ask what access each person needs and agree on a phone-light interval with a clear end. Name a necessary check instead of guessing the other person's motive. Accessibility, work, caregiving, culture and communication needs matter. Judge the agreement by whether the people feel included and the conversation improves.
  source ids
  dwyer-meals
  radesky-profile
id
research-findings
role
findings
title
What studies found about interruptions and phone access
intro
A result is most useful when you know the task, the people and the outcome that were actually studied.
items
- label
  Allow for the demands of switching tasks
  text
  In laboratory task-switching studies, people commonly respond more slowly or less accurately just after changing task rules than when repeating them. Kiesel and colleagues' review examines both preparation for the new task and interference from the old one. A switch cost is that measured performance difference; it is not a fixed number of minutes lost from a workday. Preparation, practice, timing and the tasks themselves matter. The practical implication is to give demanding work a suitable interval and make transitions deliberate when possible. It does not require ignoring useful interruptions or treating every planned change of activity as harmful.
  source ids
  kiesel-switching
  kiesel-full
- label
  Shape alerts even when you leave the phone untouched
  text
  A phone can compete for attention without being picked up. Stothart, Mitchum and Yehnert found that incoming call or text notifications disrupted undergraduates' performance on an attention-demanding laboratory task even without direct phone interaction. This supports taking optional alerts seriously, rather than assuming that refusing to answer removes their effect. The study does not establish equal harm from every notification in everyday life. A quiet device, an allowed-contact list or a scheduled check are different ways to protect a suitable task while keeping important access. Choose according to what the alert means and the cost of missing it.
  source ids
  stothart-notifications
  apple-focus
- label
  Balance notification batching with the need to stay informed
  text
  Batching means receiving notifications at scheduled intervals instead of whenever they arrive. Fitz, Kushlev and colleagues compared usual delivery, hourly batches, three daily batches and no notifications in a randomized field experiment with 237 completing participants in India. After a baseline week, the intervention lasted two weeks. Three daily batches improved several self-reported outcomes, including concentration and perceived productivity, and reduced phone unlocks. They also increased fear of missing important notifications. The no-notification group reported more anxiety and fear of missing out; hourly batching showed few benefits. People could still open apps to check messages. This is evidence for a tradeoff, not proof of improved objective work output or a required three-check schedule.
  source ids
  fitz-batching
- label
  Use device logs to improve recall, then add context
  text
  Parry and colleagues combined 106 effect sizes comparing logged digital-media use with self-reported use. Remembered estimates correlated only moderately with logs and rarely matched the amount accurately; problematic-use questionnaires corresponded even less closely. A log is therefore useful for checking which app or time window you want to understand. It still does not explain why you used the phone or what that use did for you. Navigation, work, medical access, learning and unwanted scrolling can produce similar totals. Pair duration with purpose, content, choice and outcomes; neither a log nor a questionnaire alone tells you that someone has a disorder.
  source ids
  parry-logs
  kuss-profile
- label
  Read the internet-blocking trial as a specific intervention
  text
  Castelo, Kushlev, Ward and colleagues randomized the timing of a two-week smartphone internet block in a month-long trial involving 467 U.S. and Canadian iPhone users. The block covered mobile data and Wi-Fi; calls, texts and internet on other devices remained available. Sustained attention improved on an objective task, alongside self-reported mental health and well-being. Their intention-to-treat analyses retained participants regardless of compliance, but the primary repeated-measures analyses required complete observations. Only 119 of the 467 met the compliance threshold, and attrition and expectations limit generalization. The result supports the possibility that changing access helps. It does not establish that a single-app limit, focus mode or another-room phone produces the same benefit, or replaces clinical treatment.
  source ids
  castelo-blocking
- label
  Understand work resumption without a universal recovery timer
  text
  Mark, Gonzalez and Harris observed 24 information workers and examined related activities called working spheres. Interrupted work could have several other activities between stopping and returning; elapsed time included those activities. That is different from experimentally measuring how long the brain needs to recover after each ping. The study also found that some interruptions supplied useful work information. Its lasting lesson is to protect continuity and understand what a switch accomplishes. The popular claim that every interruption costs about 23 minutes turns a field observation into a universal cognitive rule that the study did not test.
  source ids
  mark-fragmentation
id
where-findings-differ
role
cautions
title
Where broad phone rules outrun the evidence
items
- label
  Choose phone placement from your task and access needs
  text
  The mere-presence question asks whether an unused nearby phone reduces cognitive performance. Parry's preregistered review of 56 studies and 7,093 participants found a significant pooled effect for working memory, with null summary effects for other cognitive functions and substantial methodological uncertainty. Böttger, Poschik and Zierer's 2023 synthesis combined 22 studies and 43 effects involving phone presence or use: the overall effect was small (g = −0.14), memory was affected (g = −0.23), and the attention subgroup was not significant (g = −0.07). These standardized differences are not percentages of brainpower lost. The reviews differ in scope and analysis. Compare safe placement options if useful; they do not establish one mandatory distance for everyone.
  source ids
  parry-presence
  bottger-presence
- label
  Judge competing tasks without labeling a person's ability
  text
  Reading while composing a message can create an immediate conflict, but a person's usual media habits are a different research question. Parry and le Roux's meta-analysis of 118 assessments found a small pooled association between media multitasking and cognitive control that varied with the measure and outcome. Most included assessments involved students, and the review did not resolve causality. It cannot tell whether media habits change cognitive ability, people with certain difficulties multitask more, or other factors explain the relationship. Judge the actual arrangement by errors, recall, time and strain. A habit score does not prove a stable deficit or settle how a practiced combination will work.
  source ids
  parry-multitasking
- label
  Match a digital break to the outcome being studied
  text
  Short breaks and a two-week internet block are different interventions. King, Moon and Kushlev randomly assigned 640 college students to usual behavior or a daily 30-minute screen-free interval after waking, before bed or at a chosen time for seven days. The main comparison found no improvement in daily affect, meaning reported pleasant versus unpleasant feelings; compliance was difficult. Some analyses of actual practice found better outcomes, but those associations do not carry the same causal weight as random assignment. Eight students with no daily outcomes were excluded. Read this alongside the positive internet-blocking trial: different access changes, samples and outcomes can produce different answers, so neither establishes one universal digital-break rule.
  source ids
  king-timed-breaks
  castelo-blocking
- label
  Describe a digital break by its observable effects
  text
  A planned break can create more room for another activity; calling it a dopamine reset adds a biological claim. Berridge and Robinson's review distinguishes reward-related wanting from pleasure or liking and discusses addiction mechanisms more complex than a depleted pleasure tank. It supplies no short reset timer for ordinary scrolling. Meanwhile, the mobile-internet trial tested a substantial access change, not a validated detox dose. The useful unresolved questions concern which changes help whom, by what mechanism and at what cost. Notice urges, relief, boredom, sleep and choice in ordinary language; boredom alone does not establish withdrawal. Persistent loss of control with distress or impairment deserves assessment rather than a self-assigned addiction label.
  source ids
  berridge-reward
  castelo-blocking
  kuss-profile
  lembke-profile
- label
  Ask what a young person experiences online
  text
  Research on adolescent social media and health includes helpful connection and harmful experiences, with different patterns across people and activities. The National Academies' reviewed report did not support a population-level conclusion that social media causes changes in adolescent health. That conclusion does not mean an individual cannot be harmed. Look directly at harassment, exploitation, harmful content, social comparison and displaced sleep, while preserving useful support, identity exploration, creativity, information and community. Jenny Radesky's pediatric work adds developmental stage and family context. Discuss needs and boundaries with the young person using age-appropriate family and professional guidance. Duration alone cannot carry those meanings, and adult focus experiments cannot become youth guidance without considering age and needs.
  source ids
  nasem-adolescents
  radesky-profile
id
work-transitions
role
application
title
Keep your place when work changes
items
- label
  Leave a brief return cue when the situation allows it
  text
  Attention residue means thoughts about the task you left keep intruding while you handle another task. Sophie Leroy and Theresa Glomb's 2018 studies tested a ready-to-resume plan: briefly recording where you were and what you would do on return. It reduced residue and improved performance on the interrupting task. The researchers did not test whether performance improved after returning to the original task. A private example is: “Checked rows 1–20; next compare row 21 with the receipt; two dates remain uncertain.” That is an adaptation, not a required form or proven shortcut. Skip the note when an urgent response matters more, and protect confidential information.
  source ids
  leroy-resume
- label
  Check a handoff note for usefulness and effort
  text
  A tool can reduce distraction while adding another demand. Van Zoonen and Scharp's field experiment followed 50 employees in a Dutch technology consultancy across four days, with 25 in each group. Ready-to-resume plans reduced attention residue and weakened its association with exhaustion, but the intervention group had higher general exhaustion. The authors proposed explanations that require further testing; the study did not show a fatigue remedy. Judge your own brief note by whether it helps and whether keeping it becomes a chore. Simplify or stop it if the burden outweighs the benefit. Findings about unplanned work intrusions do not automatically explain planned rest breaks.
  source ids
  vanzoonen-intrusions
- label
  Improve the work system as well as the phone setting
  text
  If four people need immediate replies through four channels while you are responsible for a demanding task, the conflict belongs in the work design. The Health and Safety Executive's Management Standards address demands such as workload, work patterns and the work environment. A practical discussion can name the highest-priority task, the person covering urgent contact, and the expected reply window for routine questions. Skill, tools, staffing, incentives, health and authority also affect productivity. Protected time is useful only when it fits those responsibilities; the aim is reliable work and care, not accumulating uninterrupted minutes at everyone else's expense.
  source ids
  hse-demands
  newport-profile
id
keeping-changes-useful
role
application
title
Make a change easy to keep and revise
items
- label
  Choose a result that matches your reason for changing
  text
  Different goals need different evidence. If the problem is proofreading errors, count errors; if it is a late bedtime, note when you actually stopped and slept. If it is shared time, ask whether the interaction felt better. Do not use a laboratory attention score or a falling phone total as a substitute for those outcomes. Mark's work studies real activities, while Gazzaley's research measures particular cognitive functions. A smaller screen total can accompany worse access or simply more laptop use. Success means the chosen arrangement served the need you named.
  source ids
  mark-profile
  gazzaley-profile
- label
  Keep a light record of purpose, timing and experience
  text
  Make the record small enough to use: the task, the change, the result and an important tradeoff. A log can help locate an evening pattern that memory missed, but there is no need to turn every unlock into a judgment. Note whether use was intentional, necessary, enjoyable or a detour and whether sleep, distress or connection changed. A brief unsafe interaction can matter more than hours of useful work. Parry's measurement review supports checking recalled amount; interpretation still needs your context. Keep sensitive messages and other people's information out of the record.
  source ids
  parry-logs
  nasem-adolescents
- label
  Make the allowed-contact list work in practice
  text
  A setting is useful only if the needed contact can still reach you. Apple's Focus guidance permits selected people and apps, with options for calls and repeated calls; settings and available features vary by device and software. Check your device's current instructions, choose the channels your responsibilities require, and test them with a safe ordinary message before relying on the arrangement. Preserve medical, accessibility, caregiving, severe-weather and emergency access unless a safe alternative exists. Restoring a needed route is a sensible adjustment. A focus tool should support your life rather than silently remove a responsibility.
  source ids
  apple-focus
  apple-allow
- label
  Revisit social agreements when people's needs change
  text
  A phone-light meal that worked last month may need a different arrangement during illness, travel or a change at work. Ask whether everyone still has access and feels included, whether checks need explaining, and when the agreed interval ends. The restaurant experiment measured distraction and enjoyment, not attachment or character. Radesky's family-media perspective keeps context visible. Revisit the agreement if it excludes someone, interferes with care or leaves the interaction unchanged. A mutual norm is more informative than judging the relationship from a face-down phone or a single necessary check.
  source ids
  dwyer-meals
  radesky-profile
- label
  Keep the least disruptive change that answers your question
  text
  An allowed-contact list, one muted app, a scheduled check, a shorter work interval or more phone distance changes different things. Start with a safe option proportionate to the task and make it easy to end. If blocking an app leads to the same detour on a laptop, the useful lesson concerns the activity or cue rather than the device. Newport and Eyal offer practical frameworks for intentional work and environment design, but no framework establishes a universal focus-block length. Keep, adjust or end the experiment from the result and the responsibilities it affected.
  source ids
  newport-profile
  eyal-profile
  apple-focus
id
professional-perspectives
role
perspectives
title
Use professional ideas for the question they answer
items
- label
  Use work and behavior frameworks as planning tools
  text
  Cal Newport's protected-work writing and Nir Eyal's behavioral-design writing make everyday choices easier to describe: reserve time for a demanding task, decide what the tool is for, notice a trigger, and prepare an alternative. Newport is a computer-science professor; Eyal is an author and consultant who previously taught at Stanford. Their public frameworks are not clinical treatments or experimentally established doses of phone-free time. Use a framework to make a plan concrete, then judge the plan by its results. Buying a book, app or workshop is not required for this experiment.
  source ids
  newport-profile
  newport-public
  eyal-profile
- label
  Include platform design in the explanation
  text
  Tristan Harris and the Center for Humane Technology draw attention to platform incentives and design features, such as infinite scrolling and attention-grabbing notifications. This is a design and policy perspective, not proof that every person is harmed or a clinical diagnosis. It gives a useful reason to look beyond willpower: a feed without a natural stopping point creates a different experience from opening a message and finishing a reply. Look for the feature that competes with your intention and choose a specific boundary around it. Responsibility also belongs to designers, organizations and communication norms.
  source ids
  harris-profile
  cht-design
- label
  Check the exact evidence behind attention-training promises
  text
  Jha studies attention and mindfulness-based training, while Gazzaley develops and evaluates technology-based cognitive interventions. Their research leaves room for useful training while requiring a precise question: which program, which people, which outcome and what comparison? Improvement on one test does not establish improved work, sleep or every attention problem. Gazzaley also has disclosed commercial and investment roles connected to technology. These fields offer questions to investigate, not a reason to buy a generic brain-training product or regard a popular practice as guaranteed treatment.
  source ids
  jha-lab
  gazzaley-profile
id
safety-and-support
role
cautions
title
Protect safety and know when to get help
items
- label
  Stop safely before using the phone during a hazardous task
  text
  NHTSA says safe driving requires your full attention; phone conversation and texting can both divert it. David Strayer's research also examines cognitive distraction in vehicles, so hands-free access should not be treated as an all-clear. Never text, call, scroll or adjust a phone while driving, cycling in traffic, operating machinery or tools, working at heights, or doing another safety-critical task. Stop in a safe place first and follow local and workplace rules. Personal comparisons of desk-task focus do not belong in hazardous situations. Keep emergency access available through a safe arrangement rather than handling the device during the task.
  source ids
  nhtsa-safety
  strayer-profile
  strayer-public
- label
  Bring persistent or sudden attention changes to qualified care
  text
  Occasional distraction is common. NIMH distinguishes adult ADHD by symptoms that are frequent, persistent, impair daily life and occur across situations, with a developmental history considered in assessment. A screen-time total cannot establish that pattern. Persistent attention or organization trouble across settings, or a sudden change with sleep, mood, medication, substance use, illness or injury, deserves qualified assessment. Describe when it began, where it occurs and what became harder. Health, environment and responsibilities may all matter. Do not start, stop or change prescribed medication from this article; discuss treatment questions with the prescriber. Attention experiments can support understanding without replacing care.
  source ids
  nimh-adhd
  nimh-help
- label
  Get immediate help when you cannot stay safe
  text
  If you may harm yourself or cannot stay safe, get immediate help rather than waiting for a phone experiment to work. In the United States, call or text 988 for crisis support, or call 911 for a life-threatening emergency. Elsewhere, use local emergency or crisis services. NIMH also advises professional help for severe or persistent symptoms that affect functioning. This is general education, not a diagnosis or treatment plan. Named sources. Honest paraphrase of the finding. Not medical, legal, or financial advice.
  source ids
  nimh-help
id
one-useful-test
role
next_steps
title
Try one change around one real task
intro
These are practical adaptations of the evidence, not a course, a required regimen or a test of your character.
items
- label
  Protect one important task and keep essential access
  text
  Choose one upcoming task and one outcome: finishing a draft, catching errors, remembering a paragraph or enjoying a conversation. Write what contact must remain available. Change one optional interruption for that task through an allowed-contact list, a muted channel, a scheduled check or safe phone distance. At the end, note the result, strain and anything important you missed. Keep, adjust or end the change. This small comparison cannot prove a general cause, but it can show whether the arrangement is worth using again. For community discussion about phones and a quieter week, see STUDself at /self/.
  source ids
  stothart-notifications
  apple-focus
  mark-profile
- label
  Try one optional channel with a suitable check time
  text
  Keep required work, medical, accessibility, caregiving, severe-weather and emergency routes open. Pick one optional channel that interrupts a suitable stationary task and decide when it is reasonable to check it. The batching study makes scheduling a useful question, but its exact schedule is not a prescription. After the task, compare completion and missed contact with your usual arrangement. Restore access if the cost of waiting was higher than expected. A less intrusive change can be successful even if the daily screen total barely changes.
  source ids
  fitz-batching
  apple-focus
- label
  Try a workable handoff from evening use to sleep
  text
  For several nights, identify the activity that usually carries you past your intended bedtime and give it a stopping point. Prepare a simple alternative, such as putting the next morning's things in place, without removing needed phone access. Note bedtime, sleep and whether the transition was workable; change the plan if it simply shifts the delay elsewhere. The bedtime pilot supplies bounded evidence, not a rule for every bedroom. The Sleep topic provides further reading, and persistent sleep or mood problems deserve qualified care.
  source ids
  he-bedtime
  eyal-profile
  nimh-help
id
checking-focus-claims
role
perspectives
title
Check common focus claims
intro
Use these concise verdicts alongside the fuller explanations above. A useful claim says what was measured and leaves room for the limits of the finding.
items
- label
  Protect demanding tasks around switches
  text
  Claim: Switching between tasks can carry a performance cost. Verdict: established for studied task-switching conditions. The size and practical meaning depend on the task, preparation and measure; there is no universal workday penalty.
  source ids
  kiesel-switching
- label
  Use interruption findings within their measured limits
  text
  Claim: Every interruption costs about 23 minutes. Verdict: not supported. Elapsed time before returning to a work sphere includes intervening activity; it is not a universal cognitive recovery period.
  source ids
  mark-fragmentation
- label
  Judge multitasking by the task and result
  text
  Claim: People who media multitask are generally worse at attention. Verdict: not established as a general rule. The pooled association is small, varies across measures and leaves causality unresolved.
  source ids
  parry-multitasking
- label
  Test phone placement and preserve needed access
  text
  Claim: A phone on the desk always drains your brain. Verdict: not supported. Reviews find limited, outcome-specific effects and methodological uncertainty; they do not establish harm on every task.
  source ids
  parry-presence
  bottger-presence
- label
  Evaluate digital breaks without a reset claim
  text
  Claim: A dopamine detox resets the brain. Verdict: not supported. A change in urges or behavior is not evidence that dopamine was depleted or reset on a fixed timer.
  source ids
  berridge-reward
- label
  Pair media amount with experience and context
  text
  Claim: More screen time proves social media caused poor mental health. Verdict: not supported by duration alone. The National Academies' adolescent review did not establish population-level causality; specific harms still require attention.
  source ids
  nasem-adolescents
- label
  Balance quieter alerts with staying informed
  text
  Claim: Turning off all notifications always feels better. Verdict: not supported. The no-notification group in Fitz and colleagues' trial had more anxiety and fear of missing out; even the three-batch group experienced some increased fear of missing notifications.
  source ids
  fitz-batching

related

habits
sleep
anxiety

sources

id
kiesel-switching
title
Control and interference in task switching—A review
url
https://pubmed.ncbi.nlm.nih.gov/20804238/
kind
review
accessed at
2026-10-01
supports
Task preparation and interference; variable task-switching response-time/error costs.
limitations
The PubMed abstract and full author-uploaded review were inspected. Laboratory tasks do not establish a universal recovery time after an interruption.
id
kiesel-full
title
Control and Interference in Task Switching—A Review — author-uploaded full text
url
https://www.researchgate.net/publication/46094269_Control_and_Interference_in_Task_Switching-A_Review
kind
review
accessed at
2026-10-01
supports
Full author text describes slower responses and increased errors after rule switches, preparation and differing paradigms.
limitations
Author-uploaded publication inspected; same work as kiesel-switching, not an independent corroborating study.
id
mark-fragmentation
title
No Task Left Behind? Examining the Nature of Fragmented Work
url
https://ics.uci.edu/~gmark/CHI2005.pdf
kind
study
accessed at
2026-10-01
supports
Observation of 24 information workers; work-sphere fragmentation and resumption with intervening activities.
limitations
Small observational workplace sample; elapsed resumption time is not experimentally measured cognitive recovery from a ping.
id
stothart-notifications
title
The attentional cost of receiving a cell phone notification
url
https://pubmed.ncbi.nlm.nih.gov/26121498/
kind
study
accessed at
2026-10-01
supports
Notifications disrupted the studied attention task without direct phone interaction.
limitations
Abstract inspected; one laboratory task does not establish equal costs for all everyday alerts.
id
fitz-batching
title
Batching smartphone notifications can improve well-being
url
https://static1.squarespace.com/static/57a40c19414fb54f51f8095f/t/614a55faa7b89e25f4e48ad1/1632261627146/2019%2BFitz%2BBatching.pdf
kind
study
accessed at
2026-10-01
supports
Four conditions, 237 completing participants in India; three daily batches improved several self-reported outcomes and reduced unlocks while increasing notification FoMO. No-notification delivery increased anxiety.
limitations
Published author-hosted PDF methods, Table 2 and results inspected. Multiple exploratory comparisons, self-reported productivity, context-specific sample; hourly batching showed few benefits.
id
parry-logs
title
A systematic review and meta-analysis of discrepancies between logged and self-reported digital media use
url
https://purehost.bath.ac.uk/ws/files/219658181/Final_Manuscript.pdf
kind
review
accessed at
2026-10-01
supports
Preregistered synthesis of 106 effect sizes; moderate correspondence and inaccurate amount estimates; weaker problematic-use correspondence.
limitations
University-hosted accepted manuscript opened. Neither self-report nor logs establish the purpose, individual harm or diagnosis.
id
parry-multitasking
title
“Cognitive control in media multitaskers” ten years on: A meta-analysis
url
https://cyberpsychology.eu/article/view/13303
kind
review
accessed at
2026-10-01
supports
118 assessments; small pooled association with measurement/outcome variation and unresolved causality.
limitations
Full journal text inspected; most assessments involved students; habitual media multitasking differs from immediate task competition.
id
parry-presence
title
Does the Mere Presence of a Smartphone Impact Cognitive Performance? A Meta-Analysis of the “Brain Drain Effect”
url
https://research.vu.nl/en/publications/does-the-mere-presence-of-a-smartphone-impact-cognitive-performan/
kind
review
accessed at
2026-10-01
supports
University-hosted abstract reports 56 studies, 7,093 participants; only working-memory pooled effect significant; other functions null.
limitations
Official abstract inspected, not full publisher article; heterogeneity and poor statistical power limit interpretation.
id
bottger-presence
title
Does the Brain Drain Effect Really Exist? A Meta-Analysis
url
https://pmc.ncbi.nlm.nih.gov/articles/PMC10525686/
kind
review
accessed at
2026-10-01
supports
22 studies, 43 effects; overall g −0.14, memory −0.23, attention −0.07 nonsignificant; heterogeneous presence/use comparisons.
limitations
The full article was reviewed. Its scope differs from Parry’s review, and the pooled standardized effects are not percentages of brainpower.
id
castelo-blocking
title
Blocking mobile internet on smartphones improves sustained attention, mental health, and subjective well-being
url
https://pmc.ncbi.nlm.nih.gov/articles/PMC11834938/
kind
study
accessed at
2026-10-01
supports
Preregistered randomized timing of two-week block, 467 unique participants; objective sustained-attention improvement, calls/texts preserved; 119 compliant.
limitations
The full primary article was reviewed. Primary repeated-measures intention-to-treat analyses used complete cases; attrition, low compliance and possible expectancy effects limit interpretation. The study does not establish equivalence with clinical treatment.
id
dwyer-meals
title
Smartphone use undermines enjoyment of face-to-face social interactions
url
https://static1.squarespace.com/static/57a40c19414fb54f51f8095f/t/5a57cfe70d92975070d73bf5/1515704296209/Dwyer%2BKushlev%2BDunn%2BJESP.pdf
kind
study
accessed at
2026-10-01
supports
Restaurant field experiment and experience sampling; distraction and enjoyment under studied phone-use conditions.
limitations
Author-hosted manuscript opened; situational average differences do not establish attachment, character or every relationship's needs.
id
he-bedtime
title
Effect of restricting bedtime mobile phone use on sleep, arousal, mood, and working memory: A randomized pilot trial
url
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0228756
kind
study
accessed at
2026-10-01
supports
38 randomized participants; four-week intervention, 30-minute pre-bed restriction; improved selected sleep/arousal outcomes.
limitations
Full journal article opened. Small selected sample with poor sleep and substantial bedtime use; intervention cannot isolate a single mechanism or establish a universal rule.
id
leroy-resume
title
Task interrupted: A plan for returning helps you move on
url
https://www.washington.edu/news/2018/01/16/task-interrupted-a-plan-for-returning-helps-you-move-on/
kind
official
accessed at
2026-10-01
supports
University account of Leroy and Glomb's four studies, attention residue and ready-to-resume planning improving interrupting-task performance.
limitations
University research account inspected, not full journal article; explicitly states return performance on the original task was not tested.
id
vanzoonen-intrusions
title
Managing Daily Work Intrusions: An Intervention to Reduce Attention Residue and Exhaustion
url
https://www.researchgate.net/publication/392348289_Managing_daily_work_intrusions_An_intervention_to_reduce_attention_residue_and_exhaustion
kind
study
accessed at
2026-10-01
supports
Author-uploaded manuscript methods/results: 50 employees, four days, reduced residue but increased general exhaustion; weakened residue/exhaustion association.
limitations
The full author manuscript was inspected. This short Dutch consultancy study had attrition and does not establish fatigue relief or effects of planned breaks.
id
berridge-reward
title
Liking, Wanting and the Incentive-Sensitization Theory of Addiction
url
https://pmc.ncbi.nlm.nih.gov/articles/PMC5171207/
kind
review
accessed at
2026-10-01
supports
Reward-related wanting and liking involve separable mechanisms; addiction is more complex than a pleasure reservoir.
limitations
Full author manuscript opened. Addiction neuroscience does not validate a short dopamine reset protocol for ordinary phone use.
id
nasem-adolescents
title
Social Media and Adolescent Health — Chapter 4: Social Media and Adolescent Health
url
https://www.nationalacademies.org/read/27396/chapter/6
kind
review
accessed at
2026-10-01
supports
Reviewed committee analysis: insufficient support for population-level causality; differentiated benefits, harms and experiences.
limitations
Chapter text inspected; narrative committee synthesis rather than a systematic review; adolescent scope cannot be generalized to every adult.
id
kushlev-opportunity
title
An Opportunity Cost Framework of Digital Well-Being
url
https://doi.org/10.1111/spc3.70144
kind
professional
accessed at
2026-10-01
supports
2026 theoretical framework distinguishes displacement, substitution and interference and compares use with available alternatives.
limitations
Journal full text opened. A conceptual synthesis, not a validated diagnostic tool, causal estimate or tested personal regimen.
id
king-timed-breaks
title
Time-Specific Digital Detox Interventions: Effects and Effectiveness Among College Students
url
https://assets.pubpub.org/rn8ecc8o/tmb_tmb0000173-31755709329996.pdf
kind
study
accessed at
2026-10-01
supports
In this 2025 primary paper, 640 college students were randomized to control or 30-minute daily no-screen intervals. The seven-day daily-affect comparison was null, compliance was difficult, and 632 participants entered the analysis.
limitations
Full publisher-hosted PDF opened; brief college experiment with self-reported compliance. Actual-practice associations are not equivalent to the randomized main comparison.
id
nimh-adhd
title
ADHD in Adults: 4 Things to Know
url
https://www.nimh.nih.gov/health/publications/adhd-what-you-need-to-know
kind
guideline
accessed at
2026-10-01
supports
Persistent impairing symptoms across situations, developmental history and qualified assessment; ordinary distraction differs.
limitations
Official public guidance opened; educational, not individual diagnosis or medication instruction.
id
nimh-help
title
My Mental Health: Do I Need Help?
url
https://www.nimh.nih.gov/health/publications/my-mental-health-do-i-need-help
kind
guideline
accessed at
2026-10-01
supports
Severe/persistent functioning changes warrant care; immediate self-harm support via 988 and life-threatening emergencies via 911 in U.S.
limitations
Official guidance opened; general triage, U.S. routes; sudden-change and prescriber language also preserves the approved original safety boundary.
id
nhtsa-safety
title
Distracted Driving
url
https://www.nhtsa.gov/risky-driving/distracted-driving
kind
official
accessed at
2026-10-01
supports
Driving requires full attention; calls, texting and device adjustment create safety risks.
limitations
Official guidance opened; local laws vary. Other safety-critical settings retain the approved precaution, rather than a claim that NHTSA directly studied them.
id
hse-demands
title
Management Standards — Demands
url
https://www.hse.gov.uk/stress/standards/demands.htm
kind
guideline
accessed at
2026-10-01
supports
Workload, work patterns and environment are organizational stress-management concerns.
limitations
Official UK workplace guidance opened; no universal schedule and no legal advice about a particular employer.
id
apple-focus
title
Set up a Focus on iPhone
url
https://support.apple.com/guide/iphone/set-up-a-focus-iphd6288a67f/ios
kind
official
accessed at
2026-10-01
supports
Selected people and apps, schedules and filters; configuration can preserve needed contact. Call options verified on linked apple-allow guidance.
limitations
Official current user guide opened; device/version dependent. Feature availability is not evidence of health or productivity benefit.
id
apple-allow
title
Allow or silence notifications for a Focus on iPhone
url
https://support.apple.com/guide/iphone/allow-or-silence-notifications-for-a-focus-iph21d43af5b/ios
kind
official
accessed at
2026-10-01
supports
People/app notification controls and call/repeated-call options.
limitations
Official linked guide opened; configuration is version dependent and should be tested with needed contacts.
id
strayer-public
title
Up to 27 seconds of inattention after talking to your car or smart phone
url
https://unews.utah.edu/articles/up-to-27-seconds-of-inattention-after-talking-to-your-car-or-smart-phone/
kind
official
accessed at
2026-10-01
supports
Official university account makes Strayer's hands-free cognitive-distraction research publicly useful.
limitations
University study account opened; particular tested systems/settings, not a universal recovery timer and no desk-task rule.
id
radesky-public
title
Radesky Research — News & Pubs
url
https://radesky.lab.medicine.umich.edu/news-pubs
kind
professional
accessed at
2026-10-01
supports
Official lab documents family-media education, research dissemination and public media coverage.
limitations
Official news/publications and About pages opened; public usefulness is not proof of a particular intervention.
id
miller-working-memory
title
How working memory gets you through the day
url
https://news.mit.edu/2018/mit-picower-how-working-memory-gets-you-through-the-day-1024
kind
official
accessed at
2026-10-01
supports
Working memory as information maintained and used for ongoing thought/action; Miller's neural account.
limitations
Official university research explanation; not a personal capacity score or a universal training prescription.
id
cht-design
title
The CHT Perspective
url
https://www.humanetech.com/the-cht-perspective
kind
professional
accessed at
2026-10-01
supports
Design advocacy identifies infinite scrolling, algorithmic curation and notifications as attention-related design features.
limitations
Official advocacy text opened; policy/design lens, not an individual causal health estimate.
id
newport-public
title
Cal Newport — author website
url
https://calnewport.com/
kind
professional
accessed at
2026-10-01
supports
Public work, books and newsletter translating intentional work and digital practices.
limitations
Official author site opened; commercial educational framework, not clinical evidence.
id
question-purpose
title
I don't think screen time is the enemy
url
https://www.reddit.com/r/nosurf/comments/1rqy6j9/i_dont_think_screen_time_is_the_enemy/
kind
question_signal
accessed at
2026-10-01
supports
Reader question about intentional use versus an unwanted total; relevance only.
limitations
Post/thread opened; self-selected personal discussion supplies no factual or clinical authority.
id
mark-profile
title
Gloria Mark — UC Irvine expert profile
url
https://experts.communications.uci.edu/profile.php?e=gloria.mark
kind
professional
accessed at
2026-10-01
supports
Role, psychology PhD, real-world media/attention research and public media work.
limitations
Official profile verifies professional scope, not each claim in media coverage.
id
leroy-profile
title
Sophie Leroy — UW Bothell faculty profile
url
https://www.uwb.edu/faculty/sophie-leroy/
kind
professional
accessed at
2026-10-01
supports
Management professor, Business dean, attention-residue research and public research explanation.
limitations
The official profile verifies the role and research context. It does not establish a universal resumption timer.
id
miller-profile
title
Earl K. Miller — MIT Picower Institute
url
https://picower.mit.edu/earl-k-miller
kind
professional
accessed at
2026-10-01
supports
Picower Professor of Neuroscience; cognitive control and working-memory research.
limitations
The official faculty profile was reviewed. Public neuroscience explanations do not supply a productivity formula.
id
jha-lab
title
The Jha Lab — Exploring Attention and Working Memory
url
https://lab.amishi.com/
kind
professional
accessed at
2026-10-01
supports
Attention/working-memory/mindfulness research and public talks, book and podcast links; university affiliation.
limitations
Lab site opened. Miami faculty HTML also retrieved directly to verify Professor of Psychology role; no claim that one duration or program universally works.
id
jha-profile
title
Amishi Jha — University of Miami faculty profile
url
https://people.miami.edu/profile/a.jha@miami.edu
kind
professional
accessed at
2026-10-01
supports
Official biography states psychology professor, Director of Contemplative Neuroscience and psychology PhD; lab/public work context.
limitations
The official faculty biography was reviewed. Appointment verification does not establish a training program’s efficacy.
id
gazzaley-profile
title
Adam Gazzaley, M.D., Ph.D. — Neuroscape
url
https://neuroscape.ucsf.edu/profile/adam-gazzaley/
kind
professional
accessed at
2026-10-01
supports
UCSF distinguished professor, Neuroscape founder, cognitive interventions and disclosed commercial/investment roles.
limitations
Official profile opened; intervention evidence is program/population/outcome specific and commercial interests matter.
id
strayer-profile
title
David Strayer, Ph.D. — University of Utah
url
https://psych.utah.edu/people/faculty/strayer-david.php
kind
professional
accessed at
2026-10-01
supports
Cognition and neural science professor, psychology PhD, attention/performance and vehicle-distraction work.
limitations
Official profile opened; safety-critical driving evidence differs from desk-task experiments.
id
parry-profile
title
Douglas Parry — Vrije Universiteit Amsterdam
url
https://research.vu.nl/en/persons/douglas-parry/
kind
professional
accessed at
2026-10-01
supports
Communication Science assistant professor, PhD, digital-media measurement, cognition and open-science work.
limitations
Official profile opened; synthesis inherits limits of included measurements and populations.
id
kushlev-profile
title
Bio — Kostadin Kushlev Ph.D.
url
https://www.kushlev.com/bio
kind
professional
accessed at
2026-10-01
supports
Georgetown psychology associate professor, Happy Tech Lab leadership and public digital-well-being research.
limitations
Official biography opened; public relevance does not establish a universal notification or phone rule.
id
ward-profile
title
Adrian Ward — UT Experts
url
https://experts.utexas.edu/adrian_ward
kind
professional
accessed at
2026-10-01
supports
UT Austin marketing associate professor, psychology PhD, technology/cognition research and media translation.
limitations
Official profile opened; prominent original phone-presence findings require later synthesis and replication context.
id
kuss-profile
title
Daria Kuss — Nottingham Trent University
url
https://www.ntu.ac.uk/staff-profiles/social-sciences/daria-kuss
kind
professional
accessed at
2026-10-01
supports
Chartered psychologist/scientist, psychology associate professor, cyberpsychology and addictive-behavior research, public dissemination.
limitations
Official profile opened; screen time, urges and an online checklist cannot diagnose a disorder.
id
radesky-profile
title
Radesky Research — Research Team
url
https://radesky.lab.medicine.umich.edu/research-team
kind
professional
accessed at
2026-10-01
supports
Jenny Radesky MD, pediatric associate professor and developmental-behavioral division director.
limitations
Official lab team opened; pediatric role does not establish effects in all adults.
id
newport-profile
title
Cal Newport — Georgetown Center for Digital Ethics
url
https://digitalethics.georgetown.edu/profiles/cal-newport/
kind
professional
accessed at
2026-10-01
supports
Provost's Distinguished Professor of Computer Science; field verified separately from author work.
limitations
Official appointment page opened; computer-science role is not attention-science or clinical credential.
id
eyal-profile
title
Nir Eyal Official Site: Articles, Videos, and Newsletter
url
https://www.nirandfar.com/
kind
professional
accessed at
2026-10-01
supports
Author/consultant, former Stanford teaching, behavioral-design books and public education.
limitations
Official biography opened; commercial frameworks and affiliate activity, not clinician or experimental efficacy evidence.
id
harris-profile
title
Tristan Harris — Center for Humane Technology
url
https://www.humanetech.com/team-board/tristan-harris
kind
professional
accessed at
2026-10-01
supports
Co-founder/president, former Google design ethicist, documentary, podcast and policy communication.
limitations
Official organization profile opened; advocacy is distinct from diagnosis or clinical intervention research.
id
lembke-profile
title
Anna Lembke, MD — Stanford Profiles
url
https://profiles.stanford.edu/anna-lembke
kind
professional
accessed at
2026-10-01
supports
Stanford professor and Medical Director of Addiction Medicine; public book/documentary education.
limitations
Official biography and appointments opened; clinical expertise does not establish addiction in ordinary phone users or a dopamine reset timer.

professional panel

name
Gloria Mark
credential
PhD in psychology; UC Irvine Chancellor's Professor of Informatics
official url
https://experts.communications.uci.edu/profile.php?e=gloria.mark
public usefulness
Official profile documents broad media coverage and public talks translating real-world multitasking.
contribution
Separate fragmented work, resumption, attention and stress from a fixed cognitive recovery timer.
boundary
Small field observations and public summaries do not establish one attention span, recovery time or optimal block.
reviewed at
2026-10-01
name
Sophie Leroy
credential
PhD; Professor of Management and Dean, UW Bothell School of Business
official url
https://www.uwb.edu/faculty/sophie-leroy/
public usefulness
Official faculty research explanation and UW News account make attention residue and ready-to-resume planning understandable.
contribution
Explain lingering thoughts after switching and assess a short return cue without promising faster later resumption.
boundary
The 2018 studies did not test original-task performance after return; later field findings include effort costs.
reviewed at
2026-10-01
name
Earl K. Miller
credential
MIT Picower Professor of Neuroscience; Professor of Brain and Cognitive Sciences
official url
https://picower.mit.edu/earl-k-miller
public usefulness
Opened MIT News and institute research pages translate working memory and cognitive control for a general reader.
contribution
Define information held and used during demanding thought, keeping exact cognitive tasks visible.
boundary
Neural mechanisms do not supply a universal productivity penalty, personal diagnosis or phone-free dose.
reviewed at
2026-10-01
name
Amishi Jha
credential
PhD; Professor of Psychology and Director of Contemplative Neuroscience, University of Miami
official url
https://people.miami.edu/profile/a.jha@miami.edu
public usefulness
Lab website documents Peak Mind, public interviews, podcasts and talks about attention and training.
contribution
Distinguish attention and working memory and ask which training program helps which population and outcome.
boundary
Military, professional and other program findings do not create a guaranteed universal mindfulness treatment.
reviewed at
2026-10-01
name
Adam Gazzaley
credential
MD, PhD; UCSF David Dolby Distinguished Professor; Neuroscape Founder and Executive Director
official url
https://neuroscape.ucsf.edu/profile/adam-gazzaley/
public usefulness
Official biography documents public cognitive-science translation, books, talks and technology-intervention research.
contribution
Keep cognitive-control measures, aging and tested interventions distinct from generic brain-training promises.
boundary
Program/population specificity and disclosed technology-company and investment interests require attention.
reviewed at
2026-10-01
name
David Strayer
credential
PhD in psychology; University of Utah Professor, Cognition and Neural Science
official url
https://psych.utah.edu/people/faculty/strayer-david.php
public usefulness
Official university public study account and Applied Cognition Lab explain hands-free vehicle distraction and its policy relevance.
contribution
Keep hazardous tasks in a stricter safety category than stationary personal focus experiments.
boundary
Driving research does not establish an optimal phone position for every desk task or replace local safety rules.
reviewed at
2026-10-01
name
Douglas Parry
credential
PhD in Socio-Informatics; Communication Science Assistant Professor, Vrije Universiteit Amsterdam
official url
https://research.vu.nl/en/persons/douglas-parry/
public usefulness
Accessible reviews address public questions about screen totals, media multitasking and phone-presence headlines.
contribution
Compare logs with remembered use and teach how outcome and measurement differences limit broad claims.
boundary
Meta-analysis cannot resolve all causal mechanisms, personal motives, clinical impairment or the best individual control.
reviewed at
2026-10-01
name
Kostadin Kushlev
credential
PhD; Georgetown Associate Professor of Psychology and Happy Tech Lab director
official url
https://www.kushlev.com/bio
public usefulness
Official research pages frame accessible questions about batching, digital breaks and everyday digital well-being.
contribution
Teach notification tradeoffs and distinguish what phone use adds, replaces and interrupts.
boundary
Notification outcomes differ across schedules and contexts; opportunity-cost framework is conceptual rather than a validated regimen.
reviewed at
2026-10-01
name
Adrian F. Ward
credential
PhD in psychology; Associate Professor of Marketing, University of Texas at Austin
official url
https://experts.utexas.edu/adrian_ward
public usefulness
Official biography documents public coverage and teaching about the psychology of technology.
contribution
Connect original phone-presence questions with later reviews and the specific mobile-internet block trial.
boundary
Mixed presence evidence and demanding intervention methods prevent an always-harmful phone-placement rule.
reviewed at
2026-10-01
name
Daria Kuss
credential
PhD; Chartered Psychologist and Chartered Scientist; Nottingham Trent Associate Professor in Psychology
official url
https://www.ntu.ac.uk/staff-profiles/social-sciences/daria-kuss
public usefulness
Official profile documents media education, cyberpsychology books and professional/government engagement.
contribution
Keep ordinary use, unwanted repeated behavior, distress and diagnosable conditions distinct.
boundary
No duration, urge or public checklist is sufficient to diagnose addiction or select treatment.
reviewed at
2026-10-01
name
Jenny Radesky
credential
MD; University of Michigan Associate Professor of Pediatrics; Developmental Behavioral Pediatrics division director
official url
https://radesky.lab.medicine.umich.edu/research-team
public usefulness
Official family-media research and professional pediatric education explain development, context and digital design.
contribution
Ask what young people see, do and need online rather than relying on duration alone.
boundary
Pediatric and family evidence cannot be generalized to every adult or used to diagnose one child.
reviewed at
2026-10-01
name
Cal Newport
credential
Georgetown Provost's Distinguished Professor of Computer Science; public work/digital-practice author
official url
https://digitalethics.georgetown.edu/profiles/cal-newport/
public usefulness
Official author site and books make protected work and intentional tool choice accessible to broad audiences.
contribution
Give protected work and communication expectations a concrete planning vocabulary.
boundary
Computer-science appointment and commercial books do not establish a universal scientific focus-block length or clinical treatment.
reviewed at
2026-10-01
name
Nir Eyal
credential
Behavioral-design author and consultant; former Stanford Graduate School of Business and d.school instructor
official url
https://www.nirandfar.com/
public usefulness
Official site provides public articles and books on habits, triggers, attention and environment design.
contribution
Notice a trigger, prepare an alternative and make an everyday plan specific enough to review.
boundary
Commercial education, consulting and affiliate activity; not a clinical credential or proof of one effective personal regimen.
reviewed at
2026-10-01
name
Tristan Harris
credential
Center for Humane Technology co-founder and president; former Google design ethicist
official url
https://www.humanetech.com/team-board/tristan-harris
public usefulness
Official profile documents public policy communication, The Social Dilemma and Your Undivided Attention.
contribution
Include platform incentives and attention-related design rather than placing the whole burden on user willpower.
boundary
Design advocacy and industry experience do not establish an individual diagnosis, causal health estimate or treatment.
reviewed at
2026-10-01
name
Anna Lembke
credential
MD; Stanford Professor of Psychiatry and Behavioral Sciences and Medical Director of Addiction Medicine
official url
https://profiles.stanford.edu/anna-lembke
public usefulness
Official biography documents Dopamine Nation, public addiction education and documentary participation.
contribution
Recognize when loss of control, distress and impaired functioning require qualified care.
boundary
Clinical addiction expertise does not make ordinary phone use addiction or establish a short dopamine reset protocol.
reviewed at
2026-10-01

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End of Attention, phones, focus