Contagious yawning in chimpanzees
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Uploaded by pkabai on Jan 6, 2011
James R. Anderson, Masako Myowa-Yamakoshi and Tetsuro Matsuzawa
Abstract: Six adult female chimpanzees were shown video scenes of chimpanzees repeatedly yawning or of chimpanzees showing open-mouth facial expressions that were not yawns. Two out of the six females showed significantly higher frequencies of yawning in response to yawn videos; no chimpanzees showed the inverse. Three infant chimpanzees that accompanied their mothers did not yawn at all. These data are highly reminiscent of the contagious yawning effects reported for humans. Contagious yawning is thought to be based on the capacity for
empathy. Contagious yawning in chimpanzees provides further evidence that these apes may possess advanced self-awareness and empathic abilities.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1810104/pdf/15801606.pdf
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GummiiBearz14 1 week ago
Thumbs up if you yawned from watching this video.
krumovies26 5 months ago