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But neuroscience disagrees. Your brain is not a Chrome browser. It is a single-core processor. When you think you are multitasking, you aren't actually doing two things at once. You are rapidly switching between two things. And every time you switch, you pay a "switching cost"—a tiny cognitive tariff that drains your energy, increases your errors, and deepens your anxiety.

Now multiply that by the 50 notifications you get a day. You aren't working 8 hours. You are working 8 hours of recovery time. But neuroscience disagrees

So tomorrow morning, try this. When you sit down to work, pick one thing. Just one. Put on noise-canceling headphones (even if you play white noise). Hide your phone. And do that one thing until it is done. When you think you are multitasking, you aren't

Twenty. Three. Minutes.