In the study 328 participants were shown a three-minute video showing other people yawning
occurs not only in humans, but also in chimpanzees and other animals, in response to hearing about, seeing or thinking about yawning
The fancier term for stretching and yawning
Other people believe that yawning
is a protective reflex to redistribute the oil-like substance called surfactant that helps keep lungs lubricated inside and keeps them from collapsing.
While it is well known that foetuses open and close their mouths, experts have disagreed over whether or not they are actually yawning
has never been determined this clear.
Participants were divided up into "triggers" - who instigated yawning
- and "observers" who responded by yawning
Research has shown that between 40 and 60 per cent of people are prone to contagious yawning
and 33 per cent of chimpanzees will yawn back at humans.
It describes yawning
as an ideal model for understanding a transitional behaviour and its relevance in neuroanatomy, neurophysiology, ontogenesis, phylogenies and social cognition.
Senju's students reported that he and his dog shared many a yawn, but no one had rigorously tested contagious yawning
It would also suggest that yawning
has nothing to do with boredom.
is widespread in many animals, contagious yawning
- a yawn triggered by seeing others yawning
- has previously only been shown to occur in humans and chimpanzees.