In Science there's a new report, Chimpanzees Are Rational Maximizers in an Ultimatum Game; the title says it all. On the other hand, The Evolutionary Origins of Human Patience: Temporal Preferences in Chimpanzees, Bonobos, and Human Adults doesn't clue you in in the title that chimpanzees have lower time preference when it come food (they're more patient and will take a bigger later payoff than humans). The most recent issue of The Economist covers these results as well as the finding of heritability in response to the ultimatum game.

Labels: Evolutionary Psychology