Scientific concept describing the cognitive switching cost when shifting attention between tasks. Research by Dr. Sophie Leroy shows that our minds continue processing previous tasks even after switching, reducing performance on new tasks by up to 40%.
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Attention Residue Concept
Attention residue is the scientific concept that there is a cognitive switching cost to shifting your attention from one task to another. Dr. Sophie Leroy defines attention residue as "the persistence of cognitive activity about a Task A even though one stopped working on Task A and currently performs a Task B."
The concept was first identified by University of Washington business professor Dr. Sophie Leroy in 2009. Her research revealed that people need to stop thinking about one task to fully transition attention and perform well on another, yet it is difficult to transition away from unfinished tasks.
The American Psychological Association reports that even brief mental blocks from task switching can cost up to 40% of productive time. Effects can last anywhere from 15 to 23 minutes after switching tasks.
Block time on your calendar for sprints of focused energy dedicated to single tasks.
Time pressure while finishing helps disengage and move to the next task more effectively.
Take energizing breaks without completing other tasks or checking email. Stand up, walk, drink water, or stretch.
Before switching tasks, write down exactly where you are, note next steps, and capture any open loops.
Group similar tasks together to minimize cognitive switching costs.
Free concept — implementation cost varies by chosen strategies and tools.
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