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Monkeys Can Tell What's Fair
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Key Facts In This Video
Initially, capuchin monkeys are happy to be rewarded with a cucumber for performing the same task. 00:20
A capuchin monkey will become visibly upset if it sees that its comrade is getting a better reward for a task that both have performed. 00:42
Chimpanzees have been known to reject a reward if they see that another chimp has received a worse one. 00:58