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Monkeys Show Regret And Disappointment Like Humans: Study

06/01/2011 01:10 pm ET | Updated Nov 16, 2011

We humans tend to think of ourselves as the only sentient beings capable of regret, a key emotion that helps keep us from making the same mistakes over and over.

Now a new study shows that rhesus monkeys may be saddled with the same feelings of disappointment — at least when they lose at rock, paper, scissors.

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