New popscience piece on why pupil size changes are cool:
https://psyche.co/ideas/the-pupil-of-the-eye-opens-a-remarkable-window-into-the-mind

Included: an assignment that lets you measure pupil size that I developed for teaching. In my classes, this replicates Hess & Polt's 1964 effort finding without an eyetracker. Feel free to use it!

Thanks a lot to Christian Jarrett of Psyche.co for all the work on editing.
#pupillometry
#psychology