After getting accustomed to people, apes open wide at sight of gape-mouthed human strangers
M. Campbell and F. de Waal 2014/Yerkes National Primate Research Center/Emory Univ.
Chimpanzees possess a flexible, humanlike sensitivity to the mental states of others, even strangers from another species, researchers suggest March 11 in the Proceedings of the Royal Society B. Empathy’s roots go back at least to the common ancestor of humans and chimps, they say.
Psychologist Matthew Campbell and biologist Frans de Waal, both of Emory University in Atlanta, treated chimps’ tendency to yawn when viewing videotapes of others yawning as a sign of spontaneous empathy. Their research follows other scientists’ observations that young chimps mimic scientists’ yawns (SN Online: 10/16/13).
Nineteen chimps living in an outdoor research facility yawned when they saw the same action from chimps that they lived with, researchers and