The research suggests that yawning is triggered involuntarily when you see others yawn
as it is hard-wired into our brains because of a human trait, "echophenomenon.
Contagious yawning is triggered involuntarily when we observe another person yawn
-- it is a common form of echophenomena -- the automatic imitation of another's words (echolalia) or actions (echopraxia).
Scientists at Durham University have shown conclusively for the first time that unborn babies yawn
repeatedly in the womb.
Relatives were most likely to spark off yawns
in each other, followed by friends, acquaintances and lastly strangers.
Much like a human yawn
, in fact, and the yawns
were found to be more frequent in a warm room than in a cold one but most frequent of all during periods when the temperature was rising.
Inversely, subjects in experiments suppress yawns
if participants know they are being watched.
According to an evolutionary psychologist, it is contrary to what had been heard informally; dog owners have claimed that they catch their dogs' yawns
, but their dogs never yawned
when they did.
Monika Smith (trans) The Big Yawn
Gecko Press, 2009 32pp NZ$18.
Compare that with how often humans catch yawns
from each other: just 45 to 60 percent of the time
Diet Pepsi Max is designed to offer a great-tasting solution with a unique formula that invigorates the mind and body, preventing ill-timed yawns
from taking over.
The man yawns
widely, then seconds later the dog yawns
When some one yawns
, his or her alertness is heightened, as the sudden intake of oxygen increases the heart rate, rids the lungs and the bloodstream of the carbon dioxide build-up, and forces oxygen through blood vessels in the brain, while restoring normal breathing and ventilating the lungs.