Learning How to “Make a Deal”: Human (Homo sapiens) and Monkey (Macaca mulatta) Performance When Repeatedly Faced With the Monty Hall Dilemma

Initially, humans and monkeys showed indifference between the two options of either staying with their initial choice or switching. With experience, members of both species learned to use the switch strategy at above chance levels, but there were individual differences with only approximately half of the participants in each species learning to choose the more optimal response. Thus, humans and monkeys showed similar capacity to adjust their responding as a result of increased experience with this probabilistic task.

(Hilarious-sounding, IMO.)