To focus better, stop trying to add willpower and start removing the specific things that force your brain to keep switching context. Focus is not a personality trait you either have or lack — it is the near-total absence of task-switching, and task-switching is driven by identifiable triggers: notifications, unfinished tasks, other people, and a brain that hasn’t been trained to hold still. Remove the triggers in order and sustained attention gets much easier to produce on demand.
Key takeaways
- Switching away from an unfinished task leaves a residue of attention behind that measurably impairs performance on whatever you do next — completing the first task isn’t even enough on its own; disengaging under mild time pressure is what actually clears it (Leroy, 2009).
- Every task switch carries a hidden tax: executive control has to shift the goal and then reactivate a different set of rules, and that tax grows with how complex the new task is and shrinks when you get advance warning of the switch (Rubinstein, Meyer & Evans, 2001).
- People who habitually consume several media streams at once — heavy multitaskers — perform worse, not better, on tests of pure task-switching ability, largely because they’re less able to filter out irrelevant information once it’s in front of them (Ophir, Nass & Wagner, 2009).
- A smartphone sitting face-up on your desk measurably reduces available working memory and fluid intelligence even while it’s off and you never touch it — and the effect is largest in people who report feeling most dependent on their phone (Ward, Duke, Gneezy & Bos, 2017).
- Eight weeks of mindfulness training protected working memory capacity in a high-stress military cohort that would otherwise have seen it degrade — the effect scaled directly with how much people actually practiced (Jha, Stanley, Kiyonaga, Wong & Gelfand, 2010).
What focus actually is (and what it isn’t)
Focus is the sustained, voluntary allocation of attention to one goal-relevant target while actively suppressing everything that competes with it. Two words in that definition do the real work: sustained and suppressing. Focus isn’t the momentary act of looking at the right thing — anyone can do that for four seconds. It’s holding attention there while your brain keeps nominating other, easier things to look at instead, and saying no to all of them.
Focus and concentration get used interchangeably but aren’t quite the same thing. Concentration is the intensity of attention at a single instant — you can concentrate hard on a text message for six seconds. Focus is concentration extended across time on one target, which is rarer and more fragile, because every second that passes is another chance for something else to win the competition for your attention.
Is multitasking the opposite of focus?
Multitasking isn’t the opposite of focus — it’s the absence of it, dressed up as a skill. What people call multitasking is, with a handful of narrow exceptions involving well-practiced motor tasks, actually rapid serial task-switching: the brain leaves one task, pays a small transition cost, works the second task for a few seconds, then pays the cost again switching back. Joshua Rubinstein, David Meyer and Jeffrey Evans modelled this formally in 2001, describing executive control as two sequential stages — goal shifting (deciding to do the new thing) and rule activation (loading the specific rules the new thing requires) — and showed across four experiments that both stages take measurable time, particularly when the new task is unfamiliar or its rules are complex.
The opposite of focus, then, is not doing several things — it’s doing several things without ever finishing the transition into any one of them. Single tasking is simply the practice of refusing that trade: working one target for a stretch long enough that the transition cost gets paid once instead of dozens of times an hour.
What causes poor focus? The task-switching mechanism
Poor focus is caused by task-switching, and task-switching is caused by four identifiable triggers: notifications, unfinished work, other people, and the habit of checking. None of these require a personality flaw to explain. They require a phone, a Slack channel, an open floor plan, or simply a boring twenty seconds — all of which describe an ordinary Tuesday.
The mechanism underneath all four is the same one Rubinstein, Meyer and Evans described: every switch, however brief, forces the executive-control system to shift its goal and reload a new rule set. Sophie Leroy’s 2009 research added the detail that made this worse than a simple time tax. Across two experiments, she found that when people switched away from Task A before finishing it, part of their attention stayed attached to Task A — an attention residue — and that residue measurably dragged down performance on Task B. Finishing Task A helped, but only when it was accompanied by working under real time pressure; task completion on its own, without that pressure to disengage, wasn’t enough to fully release the earlier task’s grip on working memory.
Eyal Ophir, Clifford Nass and Anthony Wagner then showed in 2009 that this isn’t evenly distributed across people. They built a Media Multitasking Index and compared habitual heavy multitaskers (one standard deviation or more above the mean) against light multitaskers (one standard deviation or more below). The heavy multitaskers weren’t better at switching — they were measurably worse, less able to filter irrelevant information out of their environment and their own memory once it competed for attention. Practising interruption doesn’t appear to build an interruption-resistance muscle; it seems to atrophy the filter that would otherwise keep interruptions out.
The four things that reliably break focus
- Notification exposure. Cary Stothart, Ainsley Mitchum and Courtney Yehnert found in 2015 that simply receiving a cell phone notification — without looking at the phone or touching it — disrupted performance on an attention-demanding task by roughly the same magnitude as actually answering a call or replying to a text.
- Unfinished-task residue. Leroy’s attention-residue effect: switching away from something before it’s resolved leaves a portion of working memory tied up in it, even when you consciously believe you’ve moved on.
- External interruption. Colleagues, meetings, and — counter to what most office design still assumes — open floor plans. Ethan Bernstein and Stephen Turban tracked employees at two Fortune 500 headquarters through their transitions to open-plan offices in 2018 and found face-to-face interaction time fell by roughly 70% rather than rising, as people responded to the loss of visual privacy by socially withdrawing and moving conversations to email and instant messaging instead.
- Self-interruption. The habitual check — email, a group chat, a news app — performed not because anything happened, but because checking has become the default action whenever a task gets briefly uncomfortable.
Why poor focus costs more than it feels like
A single switch feels free because it’s fast, but the bill is a compounding one that shows up in the work you never quite get all the way into. The honest version of the cost isn’t a dramatic number — it’s a quiet, repeated tax that adds up across a day without ever announcing itself.
Gloria Mark, Daniela Gudith and Ulrich Klocke put a number on part of that tax in a 2008 field study of interrupted knowledge work. Their most robust finding wasn’t how long recovery takes — it was what people do about the lost time. Interrupted workers compensated by working faster once they returned to a task, finishing in comparable or even shorter time than uninterrupted workers. That sounds like good news until you see the cost: significantly higher stress, frustration, time pressure and effort, self-reported and consistent across the study. The work still got done; the person doing it paid for the interruption in a currency no completion-time metric captures.
Ophir, Nass and Wagner’s multitasking research adds a second, less visible cost: the erosion of the filter itself. Heavy media multitaskers in their study weren’t just distracted more often — they performed worse on tasks that had nothing to do with media, including tests of working memory and task-switching that were administered in a quiet lab with no phones in sight. If the habit of constant switching degrades the underlying filtering capacity, then every day spent switching heavily is potentially making the next day’s focus a little harder to produce, independent of that day’s specific distractions.
Two honest caveats. Ophir, Nass and Wagner’s multitasking study is correlational — it compared people who already differed in habitual media use, so it cannot prove that multitasking causes worse filtering rather than people with weaker filtering drifting toward heavier multitasking. And Bernstein and Turban’s open-office finding describes only two specific corporate transitions; it’s a strong, carefully instrumented result, not a universal law about every office layout everywhere.
Put together, the honest cost of poor focus isn’t one dramatic figure. It’s a stack of smaller, well-documented ones: a time tax on every switch (Rubinstein, Meyer & Evans), an attention tax that outlasts the switch itself (Leroy), a stress tax that shows up even when the work still gets finished on time (Mark, Gudith & Klocke), and — for the heaviest switchers — a filtering tax that persists even in a quiet room with no phone (Ophir, Nass & Wagner).
The five types of unfocus — and the fix for each
Because the trigger determines the fix, the same generic advice (“just concentrate”) fails differently depending on which of these five is actually running. Diagnose the type before reaching for a technique.
| Type | What it looks like | The trigger underneath | The fix that works |
|---|---|---|---|
| The Ping Reflex | You glance at your phone the instant it lights up, even mid-sentence, even when you weren’t expecting anything important | Notification exposure — the mere signal is as disruptive as answering it (Stothart, Mitchum & Yehnert, 2015) | Remove the signal, not your willpower: silence the phone and move it out of sight, not just face-down on the desk |
| The Half-Closed Tab | You’ve “moved on” to the next task but keep drifting back to think about the last one | Attention residue from an unfinished switch (Leroy, 2009) | Write one line marking exactly where you stopped and what the very next step is before you switch away |
| The Open Floor | You lose your thread every time someone walks past, a Slack message pops up, or a colleague leans over | External interruption — the visible cost of low environmental privacy (Bernstein & Turban, 2018) | Manufacture a visible, socially legible signal (headphones, a booked room, a status message) since you can’t remove the walls |
| The Reflexive Check | You open email or a group chat with no reason to, purely because the current task got briefly uncomfortable | Self-interruption as a learned escape habit, reinforced daily by heavier media use (Ophir, Nass & Wagner, 2009) | Batch checking into two or three fixed windows and treat any check outside them as a decision, not a reflex |
| The Fog | You sit down to focus and simply can’t — not distracted, just foggy, slow, and unable to hold a thought | A depleted, untrained attention system rather than an external trigger at all | Treat it as capacity, not willpower: rest, sleep, and — over weeks — deliberate attention training (Jha et al., 2010) |
Most people run two or three of these depending on the day and the room they’re in — the Ping Reflex at a coffee shop, the Open Floor at the office, the Fog after a short night’s sleep. Treat the diagnosis as situational, not a fixed personality trait.
How to focus better: the 6-step system
To focus better, work down the list of triggers in order of how cheaply you can remove them, then train the underlying capacity in the background. The first four steps are environment changes you can make in the next ten minutes. The last two are what turns an occasional good hour into a reliable one.
Step 1 — Name the one output before you touch anything
Before opening the document, the spreadsheet or the code editor, write a single sentence describing what “done” looks like for this block: “Draft section two of the proposal, 400 words, doesn’t need to be good.” This is the goal-shifting stage from Rubinstein, Meyer and Evans’s model made deliberate rather than accidental — you pay that transition cost once, on purpose, instead of paying a smaller version of it every time you re-decide what you’re supposed to be doing.
This single step also does double duty against the vague, low-grade anxiety that often masquerades as poor focus. It’s hard to drift when the target is one sentence long and sitting in front of you.
Step 2 — Put the phone somewhere that isn’t “nearby”
Adrian Ward, Kristen Duke, Ayelet Gneezy and Maarten Bos tested three phone locations in 2017: on the desk in sight, in a pocket or bag nearby, and in a separate room. Available working memory and fluid intelligence dropped in a straight line as the phone got closer — even among people who never touched it and didn’t consciously think about it — and the effect was largest for people who described themselves as most dependent on their phones. “Silence it” is not the fix this study points to. Distance is the fix. A phone on silent, face-down, six inches from your keyboard is still, per this data, costing you cognitive capacity it wouldn’t cost you from the next room.
Step 3 — Close the loop before you switch, not after
When you have to stop a task before it’s finished, spend fifteen seconds writing exactly where you stopped and the next physical action: “Stopped after the second paragraph; next step is to add the client quote.” Leroy’s research suggests the residue comes from the mind holding an open loop; a concrete written marker of where that loop closes for now does a meaningful share of what full completion would have done, without requiring you to actually finish the task before you’re allowed to leave it.
Step 4 — Batch checking instead of letting it interrupt you
Pick two or three fixed windows in the day for email, chat and news, and treat every other moment as a window where checking is closed by default rather than open by default. Stothart, Mitchum and Yehnert’s finding that a bare notification carries almost the same cost as answering it means the usual advice — “just don’t look” — under-solves the problem. The signal itself is the disruption. Batching, plus turning off the badge/banner/sound outside your checking windows, removes the signal rather than asking you to resist it.
Step 5 — Manufacture a boundary the room doesn’t give you
If your environment isn’t under your control — an open floor plan, a shared house, an always-on role — you cannot remove the interruption source the way Step 2 removes a phone. Bernstein and Turban’s open-office data makes the case for this step: the room itself will not protect your attention, since open architecture measurably increases exposure rather than collaboration-friendly proximity. Headphones, a booked room, a visible status signal, or an explicit “back at 11” message do artificially what walls used to do by default. Time blocking is the calendar-level version — a block other people can see and route around, not just an intention only you know about.
Step 6 — Train the capacity, not just the situation
Steps 1 through 5 manage triggers. This step changes what happens when a trigger gets through anyway. Amishi Jha, Elizabeth Stanley, Anastasia Kiyonaga, Ling Wong and Lois Gelfand ran an eight-week mindfulness training course with two military cohorts heading into a high-stress deployment period. Working memory capacity degraded over time in the untrained control group, as expected under sustained stress. In the trained group, the outcome split by how much people actually practiced: low practice time still saw working memory decline, but high practice time saw it hold steady or improve, alongside lower negative affect. The training here wasn’t abstract relaxation — it was attentional exercise, repeated daily, that produced a measurable protective effect under real pressure. Ten to fifteen minutes of deliberate, unstructured attention practice most days is a defensible minimum dose based on this data; more consistency mattered more than longer individual sessions.
What to do when you can’t control your environment
Most focus advice quietly assumes a private office and a phone you’re allowed to leave in another room. A lot of real jobs offer neither. Three adjustments hold up reasonably well when the room itself won’t cooperate.
Borrow the boundary instead of building it. Headphones on (even without anything playing) function as a socially legible “do not interrupt” signal in most modern offices, and a booked meeting room for solo work is a legitimate use of shared space. The point isn’t architectural privacy; it’s a visible cue that lets colleagues self-select out of interrupting you — the specific thing Bernstein and Turban’s research suggests open architecture removes by default.
Protect the first ninety minutes, not the whole day. If you can secure only one uninterrupted stretch, put it before the office fills up or before the always-on channel becomes active, and put your single highest-value task there. A short, reliably-protected window beats an aspirational, unreliable full day every time.
Set explicit office hours for interruption, and say so out loud. A simple, stated “I’m heads-down until 11, then free for anything” does more real work than it should, because it converts an ambiguous, ongoing negotiation about your attention into a known, bounded exception people can plan around.
Common mistakes that make focus worse
- Turning off notifications but leaving the phone in sight. Ward, Duke, Gneezy and Bos’s data suggests the phone’s mere presence, not just its noise, is the cost. Silencing it solves a different problem than the one you likely have.
- Chasing a new productivity app instead of removing a trigger. A new system delivers the same short-term relief as the distraction it was meant to fix, which is why it feels productive and changes little. We wrote about this pattern at length in The Shiny Object Tax.
- Treating every interruption as equally costly. One you can close cleanly (Step 3) costs far less than one you can’t. Sort interruptions by whether they leave a loop open, not by how annoying they felt.
- Scheduling “deep work” without protecting it from anything specific. A calendar block with no accompanying environment change (Step 5) is a wish, not a boundary. Cal Newport’s Deep Work makes the scarcity the protected condition, not the intention.
- Believing multitasking is a skill some people simply have. Ophir, Nass and Wagner’s heaviest multitaskers were the worst performers on task-switching itself. Practice at switching does not appear to build switching skill.
- Waiting to feel focused before starting. Focus is more often the result of starting under the right conditions than a precondition for starting. Remove one trigger and begin — the feeling tends to follow, not precede, the conditions.
When it’s more than a habit
If sitting still with a task has felt effortful and scattered across most days, most contexts, for most of your life — not just on days when the phone is nearby or the office is loud — the six steps above are working on the wrong layer of the problem. Environment fixes assume a baseline attention system that works fine once you remove the triggers. That assumption doesn’t hold for everyone.
Persistent, cross-context difficulty sustaining attention, especially alongside impulsivity or trouble with task initiation, is a core feature of ADHD, where the difficulty is in the attention system itself rather than in the number of notifications reaching it. The environment tactics in this article can still help at the margins, but they are not a substitute for an evaluation, and treating a genuine attention disorder as a discipline problem tends to produce more self-blame than progress.
A second, more common pattern is attention fog driven by chronic sleep debt or burnout rather than any single distraction. If the fog described in the diagnostic table above shows up regardless of phone placement, room, or task, it is worth treating as a rest and recovery problem before adding any more attentional technique. No amount of environment design compensates for a system that is running on genuine deficit.
The evidence behind this system
Every figure quoted above traces to a specific published study. Here is the short version of what each one actually found — and, honestly, what it doesn’t prove.
| Study | Design & size | What it found | Used here for |
|---|---|---|---|
| Leroy (2009), Organizational Behavior and Human Decision Processes | Two lab experiments on task switching | Switching before finishing Task A leaves attention residue that impairs Task B performance; time pressure helps disengagement, completion alone does not | The core mechanism and Step 3 |
| Mark, Gudith & Klocke (2008), CHI Proceedings | Field study of interrupted knowledge workers | Interrupted workers compensate by working faster with no quality loss, but report significantly more stress, frustration and effort | The hidden cost of interruption in §“Why it costs more” |
| Rubinstein, Meyer & Evans (2001), J. Exp. Psychol.: HPP | Four lab experiments, 12–36 participants each | Task switching has two stages (goal shifting, rule activation); costs rise with rule complexity and fall with advance cuing | The mechanism behind every switch, and Step 1 |
| Ophir, Nass & Wagner (2009), PNAS | Correlational comparison of heavy vs. light media multitaskers | Heavy multitaskers filter irrelevant information worse and perform worse on task-switching tests, despite more switching “practice” | Why multitasking isn’t a trainable skill; the Reflexive Check type |
| Ward, Duke, Gneezy & Bos (2017), J. Assoc. Consumer Research | Two experiments, phone placed at 3 salience levels | Available working memory and fluid intelligence drop as phone proximity increases, even when off and unused | Step 2, and the case against face-down-on-desk |
| Stothart, Mitchum & Yehnert (2015), J. Exp. Psychol.: HPP | Controlled experiment, call/text/no-notification groups | A bare notification disrupts an attention task by roughly the same magnitude as actively using the phone | The Ping Reflex type and Step 4 |
| Bernstein & Turban (2018), Phil. Trans. Royal Society B | Two field studies, wearable sensors + email/IM logs | Face-to-face interaction fell ~70% after open-office transitions; electronic communication rose to compensate | The Open Floor type and Step 5. Observational field data, not a randomised trial |
| Jha, Stanley, Kiyonaga, Wong & Gelfand (2010), Emotion | Field intervention, 2 military cohorts (n=31 trained, n=17 control) + civilian comparison (n=12) | Working memory capacity degraded under stress without training; held steady or improved with sufficient mindfulness practice | Step 6 and the training case in the Fog row |
Frequently asked questions
How can I focus better right now, in the next five minutes?
Move your phone to another room, or at minimum out of sight and on silent — proximity, not just noise, is what the evidence points to. Then write one sentence describing exactly what “done” looks like for the next block of work. Those two moves alone remove two of the four biggest triggers (notification exposure and an undefined goal) before you’ve spent a single minute on willpower.
What is attention residue?
Attention residue is the portion of your working memory that stays attached to a task you’ve switched away from before finishing it. Sophie Leroy’s 2009 research found it measurably impairs performance on whatever you do next, and that simply finishing the first task isn’t enough to fully clear it — disengaging under some time pressure is what helps people let go. In practice, writing down exactly where you stopped does a meaningful share of that work without requiring full completion.
Is multitasking ever actually more efficient?
For a narrow set of well-practiced, low-cognitive-load pairings — walking while listening to a podcast, for instance — yes, because one of the two “tasks” barely requires executive control at all. For anything that requires goal-directed thinking, the research points the other way: task switching carries a measurable time cost that grows with complexity, and people who multitask heavily as a habit perform worse, not better, on tests of the underlying switching skill itself.
Does a phone on silent still hurt my focus?
According to Ward, Duke, Gneezy and Bos (2017), yes — a silent phone on the desk in sight measurably reduced available working memory and fluid intelligence compared with the same phone in another room, even though participants weren’t using it and didn’t report thinking about it. The mere presence appears to occupy a small amount of cognitive capacity on its own. Distance, not just silence, is the more reliable fix.
Do open-plan offices help or hurt focus?
The best available field evidence says they hurt more than the design intent assumes. Bernstein and Turban’s 2018 study of two Fortune 500 companies moving to open-plan layouts found face-to-face interaction fell by roughly 70%, with people compensating through email and instant messaging rather than the hoped-for spontaneous collaboration. An open layout removes the passive protection walls and doors used to provide by default, which is why manufacturing a substitute signal — headphones, a booked room, a stated block of time — matters more there, not less.
Why can I focus for hours on a video game but not on my actual work?
Games are engineered to supply exactly the two ingredients unfocused work usually lacks: an unambiguous next action at every moment, and near-instant feedback on whether you got it right. Real work is usually the opposite — the next step is genuinely unclear, and feedback arrives days or weeks later, if at all. Step 1 (naming one concrete output before you start) is a deliberate attempt to borrow the first ingredient for tasks that don’t supply it naturally.
How is focus different from flow?
Focus is the raw ingredient; flow is a specific, more intense state that can emerge from sustained focus under the right conditions — chiefly a task whose difficulty roughly matches your skill level, with clear goals and fast feedback. You can be focused without reaching flow, but you can’t reach flow without first being focused. Building the environment conditions in this article is the groundwork; flow is the occasional bonus outcome, not the daily target.
Can I train my attention span like a muscle?
The evidence for trainability is real but modest and slow. Jha, Stanley, Kiyonaga, Wong and Gelfand’s 2010 study found that eight weeks of daily mindfulness practice protected working memory capacity in a high-stress military cohort where an untrained comparison group saw it decline — and the protective effect scaled with how much people actually practiced, not with how long the course lasted. It is a real, evidence-backed lever, but it works over weeks of consistent daily practice, not a single motivated afternoon.
Related reading on The Growth Reads
The books this system draws on
- Deep Work summary & review — the case for protecting scarce, undistracted time as the whole point
- Indistractable summary & review — turning internal and external distraction triggers into deliberate design problems
- Hyperfocus summary & review — managing attention as a finite, directable resource rather than a fixed trait
- Flow summary & review — the deeper state sustained focus makes possible
- The Shallows summary & review — how constant switching reshapes attention over the long run
Related articles
- Time blocking: how to actually make it work (and when not to)
- The shiny object tax: why your AI tools aren’t making you more productive
- How to overcome procrastination: the 6-step system that works on the real problem
- Analysis paralysis: the 6-step system to stop overthinking every decision
Go deeper
How this article was researched
The Growth Reads editorial team writes from primary sources: the books themselves, the authors’ published essays and interviews, and the peer-reviewed literature behind the claims. Every study cited above was read in the original publication or its published abstract, and every figure is quoted with its design, sample and effect so you can judge its weight rather than take ours. Where a finding is correlational rather than causal, or comes from a small number of field sites rather than a randomised trial, we say so directly in the text rather than in a footnote.
This article contains no medical advice. Attention difficulty that is persistent, cross-context, and unresponsive to environment changes is worth discussing with a qualified professional rather than treated as a discipline problem.
How we work: every article on The Growth Reads is built from the books in our library plus the research they rest on, and is reviewed and date-stamped when the evidence changes. Read our full methodology.
Sources
- Leroy, S. (2009). Why is it so hard to do my work? The challenge of attention residue when switching between work tasks. Organizational Behavior and Human Decision Processes, 109(2), 168–181. doi:10.1016/j.obhdp.2009.04.002
- Mark, G., Gudith, D., & Klocke, U. (2008). The cost of interrupted work: more speed and stress. Proceedings of the 26th ACM SIGCHI Conference on Human Factors in Computing Systems, 107–110. doi:10.1145/1357054.1357072
- Rubinstein, J. S., Meyer, D. E., & Evans, J. E. (2001). Executive control of cognitive processes in task switching. Journal of Experimental Psychology: Human Perception and Performance, 27(4), 763–797. doi:10.1037/0096-1523.27.4.763
- Ophir, E., Nass, C., & Wagner, A. D. (2009). Cognitive control in media multitaskers. Proceedings of the National Academy of Sciences, 106(37), 15583–15587. doi:10.1073/pnas.0903620106
- Ward, A. F., Duke, K., Gneezy, A., & Bos, M. W. (2017). Brain drain: The mere presence of one’s own smartphone reduces available cognitive capacity. Journal of the Association for Consumer Research, 2(2), 140–154. doi:10.1086/691462
- Stothart, C., Mitchum, A., & Yehnert, C. (2015). The attentional cost of receiving a cell phone notification. Journal of Experimental Psychology: Human Perception and Performance, 41(4), 893–897. doi:10.1037/xhp0000100
- Bernstein, E., & Turban, S. (2018). The impact of the ‘open’ workspace on human collaboration. Philosophical Transactions of the Royal Society B, 373(1753), 20170239. doi:10.1098/rstb.2017.0239
- Jha, A. P., Stanley, E. A., Kiyonaga, A., Wong, L., & Gelfand, L. (2010). Examining the protective effects of mindfulness training on working memory capacity and affective experience. Emotion, 10(1), 54–64. doi:10.1037/a0018438