Yawning is thought to cool the brain and make it more alert. Simultaneous yawning may occur when a group of people are all breathing the same warm, stale air. Or contagious yawning may have evolved to help groups remain vigilant against danger.
A yawn is a reflex consisting of the simultaneous inhalation of air and the
stretching of the ... This "contagious" yawning has also been observed in
chimpanzees, dogs, birds, and reptiles...
Oct 3, 2016 ... Yawning seems to be pretty much ubiquitous in the animal kingdom, and for
some animals — many humans included — it really is contagious.
Mar 16, 2014 ... ... “Individual Variation in Contagious Yawning Susceptibility Is Highly ...
Contagious yawning is a phenomenon that only occurs in humans and ...
Update (Jan 2016): I wrote this answer several years ago. Though it currently has
accumulated ... Do you all have any theories as to why yawning is contagious? Is
yawning contagious for blind people? Is yawning healthy? Jonathan Gouveia ...
Jun 11, 2015 ... Yawning feels good, so why not join in when someone else yawns? Well, you're
not really “joining in,” because you aren't copying the yawn on ...
Contagious yawning is associated with the same parts of the brain that deal with
... You don't need to actually see a person yawn to involuntarily yawn yourself; ...
Jul 8, 2016 ... Contagious yawning — or yawning when you see someone else do it — is a very
primitive form of communication and bonding, Rundle says.
Dec 15, 2011 ... So-called contagious yawning is a type of psychological effect that ... study marks
the first time scientists have actually observed the connection.
May 17, 2012 ... Contagious yawning - the increase in likelihood that you will yawn after ... Since
chimpanzees are highly territorial and overtly aggressive ...