Glossary
What is attention residue?
Attention residue is the lingering focus that stays stuck on a previous task after you switch to a new one. Part of your mind is still on the old task, so you perform worse on the one in front of you.
- Coined by: researcher Sophie Leroy
- Key source: her 2009 study Why Is It So Hard to Do My Work?
- The effect: attention left behind after switching tasks
- Worst trigger: switching before a task feels finished
- Related term: context switching
Where the term comes from
Sophie Leroy introduced attention residue in a 2009 research paper. She found that when people move from one task to another, a residue of attention stays on the first task, especially if it was left unfinished. That leftover focus competes with the new task and drags down performance, even though you feel like you have moved on.
Why it matters
Every time you check a message and come back, you do not return at full strength. Do that all day and you operate at a fraction of your real capacity, even though you were never idle. Attention residue is the hidden reason a day full of small switches leaves you tired and behind, with little real work to show for it.
Related terms
Attention residue is the mechanism behind context switching costs. It is the enemy of flow state and a core reason deep work needs uninterrupted blocks.
Common questions
How do you reduce attention residue?
Reach a clear stopping point before switching, batch similar work, and protect long uninterrupted blocks.
Is attention residue the same as multitasking?
No. It is the leftover cost that remains even after you fully stop one task and start another.
How long does the residue last?
It can persist for several minutes after a switch, which is why frequent interruptions add up fast.
Switch less, finish more
GoFlow is a free focus app with a deep work timer and a built-in website blocker, so one block stays one task.
Open GoFlow free