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Peer reviewed Peer reviewed
Evans, Wilson; Gratch, Gerald – Child Development, 1972
Results do not support Piaget's explanation of object conceptualization. (MB)
Descriptors: Concept Formation, Data Analysis, Error Patterns, Infants
Peer reviewed Peer reviewed
Pufall, Peter B.; And Others – Child Development, 1973
Study tests four predictions derived from Piaget's cognitive theory. (CB)
Descriptors: Age Differences, Cognitive Development, Concept Formation, Conservation (Concept)