Oct 16, 2013 · Thirty-three orphaned chimpanzees observed an unfamiliar and familiar human (their surrogate human mother) yawn, gape and nose-wipe. Yawning, but not nose-wiping, was contagious for juvenile chimpanzees, while infants were immune to contagion.

Researchers from Rennes, in cooperation with their Italian colleagues, have discovered that the sound of yawning among gelada baboons is contagious, similarly to humans. These results reveal a fascinating link between the contagiousness of …

Sep 13, 2019 · We observed contagious yawning in chimpanzees to confirm/disconfirm its existence in the behavioral repertoire of this species, and if present, provide some of the missing descriptives. We...

Aug 24, 2013 · In this study, we tested the four great ape species (Pan troglodytes, Pan paniscus, Pongo abelii, Gorilla gorilla) with two different setups aimed at assessing the propensity of individuals to spontaneously reproduce the following target actions: yawning, nose wiping, scratching, hand closing, and wrist shaking.

Apr 6, 2011 · Contagious yawning may be a sign of empathy among chimps, according to researchers who found the apes yawned more when they saw others they knew yawn.

Apr 6, 2011 · New research at the Yerkes National Primate Research Center, Emory University, may help scientists understand empathy, the mechanism thought to underlie contagious yawning, in both chimpanzees...

Jul 31, 2004 · Around 50 per cent of adult humans are prone to contagious yawning. Why we do it is controversial, although one suggestion is that it has evolved as a social cue to synchronise sleep in a...

Yawning in an Old World Monkey, Macaca nigra (Primates: Cercopithecidae) The yawn of the black ape appears to be structurally homologous to the behavior pattern widely described for other vertebrates, even in its finer details.

May 24, 2022 · In a paper published this month in Animal Behavior, he reports some evidence for how contagious yawns might have evolved to keep us safe. Science chatted with Gallup about why yawning is ubiquitous—and useful. This interview has been edited for clarity and length.

The yawn of the black ape is a fluid gaping movement of the mouth that usually lasts between one and three seconds from start to comple-tion. The yawn of the black ape has three stages that closely parallel the yawning stages described by BARBIZET (1958) for humans. 1.