By Gege Li
Choosing between going out for a run or staying slumped on your sofa can be tricky, but it turns out your eyes can reveal your decision before you have even made it.
When we do something that requires physical effort, our pupils can dilate and activity heightens in the prefrontal cortex, the part of the brain involved in cognition. Now, it seems that these two reactions may also guide our decisions about activities that we have yet to carry out.
To investigate this idea, Irma Kurniawan and her colleagues …