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Singer, Jayne M.; Fagen, Jeffrey W. – Developmental Psychology, 1992
Trained 3 month olds to move a 10-object mobile. Changing the mobile to two objects resulted in crying for half the infants. A retention test was given one and seven days later. All infants exhibited retention at one day but only noncriers at seven days. Criers displayed more anger than noncriers in the one-day retention test. (BC)
Descriptors: Affective Behavior, Anger, Crying, Expectation