AP PSYCHOLOGY

Detailed explanation-1: -The Harlow attachment theory demonstrated the importance of social contact with the mother and peers for the proper social development of infant monkeys, and the developmental impairment that results from social isolation.

Detailed explanation-2: -Even when only the wire mother could provide nourishment, the monkeys visited her only to feed. Harlow concluded that there was much more to the mother–infant relationship than milk, and that this “contact comfort” was essential to the psychological development and health of infant monkeys and children.