The one-task rule
Commit to a single task until a natural stopping point before touching another.
Key takeaways
- What it is: Commit to a single task until a natural stopping point before touching another.
- Why it works: What people call multitasking is task-switching, and the brain pays a switch cost each time it reconfigures for a new task — slower responses and more errors. Holding one task removes the repeated reconfiguration, so more of your time is spent doing the work rather than re-entering it.
- Evidence: Backed by randomized trials / meta-analyses.
- Avoid: Believing you are the exception who multitasks well. Self-rated heavy multitaskers tend to perform worse on attention and filtering, not better.
Why it works
What people call multitasking is task-switching, and the brain pays a switch cost each time it reconfigures for a new task — slower responses and more errors. Holding one task removes the repeated reconfiguration, so more of your time is spent doing the work rather than re-entering it.
How to do it
- 1Choose one task and define its stopping point before you start.
- 2Keep every other task out of sight — closed tabs, closed apps, a single document.
- 3When a competing task pops up, write it on a capture list instead of switching to it.
What the evidence says
RCT / meta-analysisTask-switching costs (slower and more error-prone performance after a switch) are among the most replicated findings in cognitive psychology across decades of lab studies.
Honest caveat: Lab switch costs are robust; translating exact millisecond costs into total daily productivity loss is an estimate, not a measured constant for your specific work.
- — Rubinstein, Meyer & Evans (2001), executive control of cognitive processes in task switching, J. Experimental Psychology
Common mistake
Believing you are the exception who multitasks well. Self-rated heavy multitaskers tend to perform worse on attention and filtering, not better.
IX Coach helps you commit to one task with a defined finish line and parks every interruption to a capture list, so the single-task commitment actually holds.
Practice this with IX Coach →