Irrelevant interruptions and their cost to thinking |

​Everyone knows that it’s dangerous to use a cell phone while driving. The danger lies in distraction; even with a hands-free phone, the conversation saps attentional resources that should be devoted to the road.

But what if you’re not driving? Suppose you’re a student working a multi-step math problem and an announcement comes in over the school PA system.  Lab studies provide some disquieting answers. Coming back to your main task after an interruption carries a cost both in time lag and in error rates…in one field study errors were observed where the main task was the…

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