As is true in humans, chimpanzees’ general intelligence is correlated to their ability to exert self-control and delay gratification, according to new research, which finding relates back to the famous “marshmallow test,” an experiment originally performed at Stanford University in the 1960s.

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As is true in humans, chimpanzees’ general intelligence is correlated to their ability to exert self-control and delay gratification, according to new research, which finding relates back to the famous “marshmallow test,” an experiment originally performed at Stanford University in the 1960s.