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In a famous series of experiments conducted by Harry Harlow, infant monkeys were separated from their mothers at birth. The infants were then given two surrogate mothers (a terry-cloth “mother” and a wire “mother”), each of which alternately had a nursing bottle that provided food to the infants. The experimental results showed that in frightening situations the infant monkeys preferred this (compare the two mothers).
What is the cloth mother, even when the wire mother had the bottle?