Coldhearted people are immune to contagious yawning, study finds

Researchers discover that a person’s level of psychopathic traits matters when it comes to catching a yawn.

If you’ve ever happened to yawn in front of a group of people, you’ve likely noticed that others will pick up the gesture and succumb to yawning themselves. Researchers believe this contagious reaction has less to do with a sleepy populace and more a primitive form of communication and bonding between humans. According to a new study, it may also reveal who amongst us is a coldhearted psychopath.


Researchers at Baylor University invited 135 participants to take what’s called the Psychopathic Personality Inventory, a test designed to gauge traits such as cruelty, selfishness, impulsivity, aggression and empathy.

By: Michael d’Estries