To investigate the debate, Dr. Harlow created inanimate surrogate mothers for the rhesus infants from wire and wood.[5] Each infant became attached to its particular mother, recognizing its unique face and preferring it above all others. Harlow next chose to investigate if the infants had a preference for bare wire mothers or cloth covered mothers. For this experiment he presented the infants with a cloth mother and a wire mother under two conditions. In one situation, the wire mother held a bottle with food and the cloth mother held no food, and in the other, the cloth mother held the bottle and the wire mother had nothing.[5]
Overwhelmingly, the infant macaques preferred spending their time clinging to the cloth mother.[5] 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. It was this research that gave strong, empirical support to Bowlby’s assertions on the importance of love and mother/child interaction.
