JULIA WATZEK: ‘Learned rules help us accurately solve many problems, but by blindly following a strategy, we sometimes fail to find more efficient alternatives. Previous research found that humans are more susceptible to this “cognitive set” bias than other primates in a nonverbal computer task. We modified the task to test one hypothesis for this … Continue reading Capuchin and rhesus monkeys but not humans show cognitive flexibility in an optional-switch task