The Wonders in Your Head

Look at the picture below. Imagine one of the operators has to pull a Cortisol lever to ‘On’ every time the Man gets stressed. The operator pushes the Cortisol lever to ‘Off’ when the Man relaxes.

If the Man gets stressed too often, the operator won’t think it’s worth switching the lever on and off… she’ll just keep the lever at ‘On’ the whole time.

In a very slightly more complicated way, this is what happens in real life...

The Wonders inside your Headk
Photograph courtesy of Paul Carrington