Attention residue, and why the page should stay quiet

Sophie Leroy's 2009 experiments found that an unfinished task follows you into the next one. A writing page with less chrome is a practical response, not a mood.

920four · October 11, 2026 · 3 min read

You sit down to write and the last thing you were doing is still in the room. The email you did not finish. The tab you meant to close. The sentence you were going to answer. The page is blank, and your attention is not.

That leftover attention has a name. In 2009, Sophie Leroy published "Why is it so hard to do my work? The challenge of attention residue when switching between work tasks" in Organizational Behavior and Human Decision Processes. She defined attention residue as cognitive activity about a first task that keeps going after you have stopped that task and started another.

What the experiments found

Leroy ran two experiments on how people move from one task to the next. The abstract reports three findings, and they are narrower than the popular retelling:

People need to stop thinking about the first task in order to fully shift their attention and perform well on the second.
It is difficult to leave an unfinished task. Performance on the next task suffers.
Finishing the first task is not, by itself, enough. Time pressure while finishing that prior task helped people disengage from it, and that disengagement contributed to higher performance on the next task.

The paper does not say that every interruption ruins an afternoon, or that a timer is a cure. It says the switch itself is costly, that an open loop is especially sticky, and that how you leave the first task changes how present you are for the second.

In the body of the same paper, Leroy describes attention residue as the persistence of cognitive activity about task A after you have stopped task A and are now doing task B. That is the whole problem in ordinary language. You are here, and part of you is still there.

What this does not prove

These were lab experiments about switching between work tasks, not a field study of journaling apps. Leroy was writing about jobs where people move among projects, tasks, and meetings. Applying that to a blank page is an inference: if residue is what makes the next task harder, then the next task should not add more things to attend to.

It is not evidence that a minimal editor raises your income, your word count, or your mood. We are not going to invent that number. The honest claim is smaller. If the research says performance drops when the previous task is still active in mind, a writing surface should not compete with the sentence you came to write.

A quiet page is a design choice

WriteFlow is built as one page. Focus mode hides the chrome. There is no feed, no streak to defend, and no score for how long you sat still. The point of that restraint is the second task in Leroy's setup: once you arrive, the app should not be another unfinished loop.

You can still leave. Esc brings the chrome back. Voice notes and idea connections exist, and they wait until you ask. The research does not require a featureless product. It argues against a product that keeps tapping you while you are trying to be in the sentence.

If you want the longer version of the study, read Leroy (2009). The abstract is enough to see what was actually tested. The rest of the internet's "attention residue" posts often add percentages the paper's abstract does not report. We left those out on purpose.

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. https://doi.org/10.1016/j.obhdp.2009.04.002