A Chimpanzee Yawning at the Same Time as His Surrogate Mother (IMAGE)

PLOS

A Chimpanzee Yawning at the Same Time as His Surrogate Mother

Caption

Researchers found that yawning, but not nose-wiping, was contagious for juvenile chimpanzees, while infants found neither yawning nor nose-wiping contagious.

Credit

Madsen EA, Persson T, Sayehli S, Lenninger S, Sonesson G (2013) Chimpanzees Show a Developmental Increase in Susceptibility to Contagious Yawning: A Test of the Effect of Ontogeny and Emotional Closeness on Yawn Contagion. <i>PLoS ONE</i> 8(10): e76266. doi:10.1371/journal.pone.0076266

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