Professor Miller says we are living in a perfect storm of cognitive degradation as a result of being constantly interrupted. The switch cost effect shows when you try and do more than one thing at a time, you do all the things you're trying to do much less competently. If we sat down together and smoked a fat spliff right now and got stoned, our IQs would go down by five points in the short term. At least in the shortterm, being chronically interrupted is twice as bad for your intelligence as getting stoned.

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