15 monkeys were trained to get food by pulling chains. They - TopicsExpress

15 monkeys were trained to get food by pulling chains. They quickly learned that one chain delivered more food than the other. If a monkey pulled the chain with the bigger reward, another monkey received an electric shock. After seeing this, 10 monkeys switched to the chain with the less food. Two other monkeys stopped pulling either chain preferring to starve rather than see another monkey in pain (Masserman et al 1964). Are humans less evolved than animals? You tell me.

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