Why you can't resist yawning

Contagious yawning - can you keep from doing it if you're told not to? A new study aimed to find out. Lee Cowan reports.

From: https://www.cbsnews.com/videos/why-you-cant-resist-yawning/

Contagious yawning: Resistance is futile

A study finds subjects told to resist contagious yawning will be more likely to succumb

From: https://www.cbsnews.com/news/contagious-yawning-resistance-is-futile/