http://www.ncbi.nlm.nih.gov/pubmed/23713135

Commun Integr Biol. 2013 May 1;6(3):e23819. doi: 10.4161/cib.23819.

How fairly do chimpanzees play the ultimatum game?

Proctor D, Brosnan SF, de Waal FB.

Source

Living Links; Yerkes National Primate Research Center; Emory University; Atlanta, GA USA.

Abstract

Humans can behave fairly, but can other species? Recently we tested chimpanzees on a classic human test for fairness, the Ultimatum Game, and found that they behaved similarly to humans. In humans, Ultimatum Game behavior is cited as evidence for a human sense of fairness. By that same logic, we concluded that chimpanzees behaved fairly in our recent study. However, we make a distinction between behavior and motivation. Both humans and chimpanzees behaved fairly, but determining why they did so is more challenging.