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Elder, Joy L.; Pederson, David R. – Child Development, 1978
Children aged 2 1/2, 3, and 3 1/2 years who had demonstrated appropriate uses for a set of objects, were asked to perform these same actions with objects which varied in similarity in the reference object, or with no object present. (JMB)
Descriptors: Age Differences, Dramatic Play, Object Manipulation, Preschool Children