It might — but not reliably for every person or every task. Some experiments find a nearby phone lowers available attention; others find no effect. Distance is worth testing, not treating as a rule.
Moving your phone farther away is a cheap experiment that may help, but “a silent phone always drains your brain” is too strong.
The original “brain drain” experiments found lower cognitive capacity when a phone was on the desk or nearby than when it was in another room, with the another-room condition performing best. Later work is less uniform: one study found no overall effect on short-term and prospective memory, one found reduced basal attention with the phone present, and a meta-analysis of 22 studies and 43 effects found an overall negative effect that varied strongly by cognitive domain.
In practice, that means distance can matter for some tasks, not that any nearby silent phone reliably impairs focus. If your phone often pulls at attention, putting it in another room is worth trying for a few days and noticing whether work feels less fragmented — rather than assuming a fixed effect.
Smartphone presence is not about receiving a call, buzz, or banner in the moment. In these studies the phone is silent and face down, not ringing or lighting up.
The idea is that the phone itself can act as a salient object — a cue that your mind monitors for, even when you intend to ignore it. Researchers describe this as a cost to available cognitive resources, not a claim that you are consciously distracted or that you have a pathology.
This is different from the pattern of picking up your phone without deciding to. That habit — reaching for your phone when bored — is about an initiated check. Presence research tests whether the phone simply being there changes what your mind has available for the task in front of you, before you touch it at all.
Most experiments compare three distances within the same lab session: phone on the desk in view, phone nearby but out of sight (pocket or bag), and phone in another room.
On the desk, the phone is both visible and within reach. Nearby keeps it accessible without a visual reminder. In another room, it is neither visible nor quickly accessible, which is why Ward and colleagues treated that condition as the cleanest comparison for “away.”
Keeping those three separate matters because they test different mechanisms. If the desk and pocket conditions both underperform the another-room condition, the claim is about mere availability, not just looking at the screen. If only the desk condition differs, the story is more about visual salience. As the later evidence shows, which pattern appears depends on the task and the lab.
The study most often cited is Ward and colleagues (2017), who ran two experiments on available cognitive capacity.
In both, people completed tasks that tax attention and working memory while their phones were placed on the desk, in a pocket or bag, or in another room. Participants were told not to think about their phones and not to look at them. Capacity was lower when the phone was nearby, and highest when the phone was in another room.
The effect held even though phones were silent and untouched, which is why the paper was interpreted as a “brain drain” from mere presence rather than from interruptions. The authors framed this as a cost to the resources you have available to focus, not as proof that you will always perform worse on every real task with a phone nearby.
Skowronek and colleagues (2023) reported a converging pattern on a different measure. They found that smartphone presence reduced basal attention — a low-level, sustained-attention capacity — which fits the idea that a nearby device can occupy background resources without an explicit interruption.
These are the strongest cases for a proximity cost, and they help explain why moving a phone farther away can sometimes make work feel less fragmented.
Not every attempt finds the same pattern, even with similar setups.
Hartmann and colleagues (2020) tested short-term and prospective memory with the same desk-nearby-another-room logic. They found no overall effect of smartphone presence on either measure. The phone being there did not reliably change recall in that paradigm.
That null result is not an outlier in the broader replication picture. Other labs revisiting the original paradigm have reported mixed or weak effects, sometimes with smaller differences between conditions and sometimes with no significant difference once the sample or task version changed. The systematic review literature now notes this explicitly: replications have been mixed.
The point is not that Ward’s result was wrong. It is that a nearby phone does not reliably reduce every form of attention or memory that has been tested. When a task leans less on the kind of capacity Ward measured, or when context differs, the presence cost can shrink to zero.
The meta-analysis makes the disagreement easier to interpret.
Böttger and colleagues (2023) pooled 22 studies and 43 effects on smartphone presence and cognition. They found an overall negative effect — on average, phone presence was associated with slightly lower cognitive performance. But they also found strong heterogeneity across cognitive domains. Effects were not uniform; they differed depending on what was being measured, such as attention, working memory, or other executive tasks.
That heterogeneity matches what individual studies show side by side: Ward and Skowronek finding costs on capacity and basal attention, Hartmann finding no overall cost on the memory tasks they used. The same phone distance can affect one demand more than another.
Other reasons for mixed results include:
Viewed together, the pattern is not “phones always drain” versus “phones never matter.” It is a small, context-dependent cost that appears more clearly for some attention-related measures than for others.
There is no rule to follow, but there is a low-cost test to run.
If you notice your phone often draws a glance, a reach, or a mental check while you work, distance removes both the visual cue and the easy reach. That aligns with the conditions where Ward and colleagues found the clearest benefit for another-room placement. It does not require you to believe the effect is permanent or large — only that removing a salient object may free a little capacity for the task at hand.
It is less useful to treat another-room storage as a strict prescription. Hartmann’s null findings and the broader mixed replications suggest you will not reliably see a memory or performance gain in every context. And distance has practical costs: missed calls, timed codes, or shared tools that legitimately need the phone nearby.
A better frame is cost and reversibility. Putting the phone in another room for a focused block is free, reversible, and quick to evaluate. Keeping it there all day regardless of need is not. The question to carry is not “is my brain being drained right now?” but “does distance make this particular block feel less fragmented?”
Try distance as an experiment, not a belief:
This is the same approach as testing any break or habit cue: keep the mechanism concrete, the measure simple, and the duration short enough to learn. For a complementary view on how brief phone use during pauses affects recovery, see do phone breaks help you recharge.
If distance alone does not change the pattern and you still open apps on autopilot once the phone is back in reach, the next step is the habit, not just the distance.
It can for some tasks. Ward and colleagues found best cognitive capacity with the phone in another room, but later studies and a 22-study meta-analysis show effects vary by task and replication has been mixed.
Sometimes. Ward et al. (2017) found lower capacity with the phone on the desk versus another room; Skowronek et al. (2023) found reduced basal attention with the phone present. Effects were not found in all paradigms.
A 2023 meta-analysis of 22 studies and 43 effects found a small overall negative effect of smartphone presence, with strong heterogeneity across cognitive domains — some tasks showed costs, others showed little.
Try it for a focused block and compare desk, nearby, and another-room placements for a few days. If distance makes work feel less fragmented, keep it for that block; if not, choose the least costly setup.
