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Introduction
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We often describe ourselves as doing several things at once. Sometimes activities really do overlap without much difficulty, such as walking along a familiar, safe route while talking. In other situations, we move back and forth between tasks that each require close attention.
Task switching means changing which goal or set of rules guides your current activity. Reading a report, answering a message, and returning to the report can involve several such changes.
The important question is not whether all multitasking is impossible. It is which activities compete for the same resources, what changes when you switch, and how you recover the task you left behind.