Harlow's monkey experiment

Harlow's monkey experiment

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Caption: Harlow's monkey experiment. Infant rhesus monkey (Macaca mulatta) with its surrogates. This is part of a study of maternal deprivation performed in the 1950s by Harry Harlow of the University of Wisconsin, USA. Harlow studied the effects of separating infant monkeys from their mothers, offering them a surrogate mother of wire or cloth. Even when the wire "mother" was warmer and had a teat that provided nourishment, the infant monkey spent more time clinging to the cloth surrogate. This suggests that the need for maternal care is separate from the need for food and warmth.

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