n isolation, and then tried to make them pregnant. Unfortunately the females did not have normal sexual relations with the male monkey, so they had to be made pregnant by a technique that Harlow and Suomi refer to as a "rape rack". When the babies were born the experimenters observed the monkeys. They found that some simply ignored the infants, failing to cuddle the crying baby to the breast as normal monkeys do when they hear their baby cry. The other pattern of behaviour observed was different in
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