Chimpanzees have been observed yawning and lying down after seeing a humanoid android mimic a yawning facial expression, indicating contagious yawning triggered by an artificial agent. This study is the first to show yawn contagion in response to an inanimate model, suggesting that yawns may serve as a rest cue in addition to a social reflex.
Robot Yawns Spark Contagious Yawning in Chimps
