Could yawning be the key to figuring out if someone is a psychopath?


If you're curious about whether a colleague, relative, romantic partner, or total stranger is a psychopath, try this simple test: Yawn, and see if they yawn back.
A new study has found that people with psychopathic personality traits don't "catch" the contagious yawn because they aren't very empathetic, lead author Brian Rundle told Today.com. Rundle says that yawning when you see someone else doing it is a primitive form of communication and bonding, but said you can't automatically label someone who doesn't yawn back at you a psychopath: You're less likely to yawn after someone else if you are older, and more likely to yawn if you know the person.
Researchers had 135 college students fill out the Psychopathic Personality Inventory, which is a standard assessment of psychopathic traits. Then, the students watched 10-second videos of people laughing, yawning, and doing nothing. They wore electrodes on their fingers, foreheads, and eyelids so they could be monitored. Rundle said those who were lower in psychopathic traits were nearly twice as likely to yawn as those who were high in those traits, but there were some students low in psychopathic traits who did not yawn, indicating more research needs to be done with a larger sample size. Rundle wants people to keep in mind that "people high in psychopathic traits may just be hard to connect with. It doesn't mean they are malicious individuals."
The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Catherine Garcia has worked as a senior writer at The Week since 2014. Her writing and reporting have appeared in Entertainment Weekly, The New York Times, Wirecutter, NBC News and "The Book of Jezebel," among others. She's a graduate of the University of Redlands and the Columbia University Graduate School of Journalism.
-
SpaceX breaks Starship losing streak in 10th test
speed read The Starship rocket's test flight was largely successful, deploying eight dummy satellites during its hour in space
-
Rabbits with 'horns' sighted across Colorado
speed read These creatures are infected with the 'mostly harmless' Shope papilloma virus
-
Lithium shows promise in Alzheimer's study
Speed Read Potential new treatments could use small amounts of the common metal
-
Scientists discover cause of massive sea star die-off
Speed Read A bacteria related to cholera has been found responsible for the deaths of more than 5 billion sea stars
-
'Thriving' ecosystem found 30,000 feet undersea
Speed Read Researchers discovered communities of creatures living in frigid, pitch-black waters under high pressure
-
New York plans first nuclear plant in 36 years
Speed Read The plant, to be constructed somewhere in upstate New York, will produce enough energy to power a million homes
-
Dehorning rhinos sharply cuts poaching, study finds
Speed Read The painless procedure may be an effective way to reduce the widespread poaching of rhinoceroses
-
Breakthrough gene-editing treatment saves baby
speed read KJ Muldoon was healed from a rare genetic condition