The cost of half-attention

The Idea

We tell ourselves we are multitasking. We are not. The brain is doing something psychologists call attention residue — when you switch from task A to task B, a part of your mind is still finishing the last sentence of A while you start B. Sophie Leroy’s research found that the residue can linger for several minutes, even when the original task was simple.

The cost is not just speed. It is judgment. Half-attention degrades the very thing that makes a task worth doing — the small, careful decisions only possible when you’re entirely there.

One Question

Where in your day are you trying to do two things at once that would each go better separately?

Today’s Action

1. Pick the one task that suffers most from your divided attention right now.
2. Block 30 minutes for it. Phone in another room. One tab open.
3. Notice, when you finish, how much less tired you feel than after a “busy” hour.

Go Deeper

Half-attention feels productive because it feels busy. Real attention feels slow at first, then quietly fast. The trade is always worth it.

Sources

• Sophie Leroy — Why is it so hard to do my work?
• Cal Newport — Deep Work