title: How fairly do chimpanzees play the ultimatum game?
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.
authors.affiliation: Living Links; Yerkes National Primate Research Center; Emory University; Atlanta, GA USA.
authors.forename: Darby
authors.initials: D
authors.lastname: Proctor
authors.forename: Sarah F
authors.initials: SF
authors.lastname: Brosnan
authors.forename: Frans B M
authors.initials: FB
authors.lastname: de Waal
keywords: behavioral economics; chimpanzee; fairness; primate; ultimatum game