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Gottfried, Allen W.; And Others – Developmental Psychology, 1978
Infants ranging from 6 to 12 months were randomly assigned to one of three conditions: (1) allowed to look at a specified object, (2) allowed to look at and manipulate it, or (3) allowed to look at the object and to manipulate the transparent box in which it was encased. (JMB)
Descriptors: Infants, Learning Modalities, Memory, Object Manipulation