The problem this research identifies with this work strategy is that when you switch from some Task A to another Task B, your attention doesn't immediately follow-a residue of your attention remains stuck thinking about the original task. This residue gets especially thick if your work on Task A was unbounded and of low intensity before you switched, but even if you finish Task A before moving on, your attention remains divided for a while.
( Cal Newport )
[ Deep Work: Rules for Focused ]
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