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Cognitive Development in Retarded and Nonretarded Persons: Piagetian Tests of the Similar Structure Hypothesis.
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Weisz, John R.; Yeates, Keith Owen – Psychological Bulletin, 1981
Surveys 30 studies involving 104 separate tests of the "similar structure hypothesis" which holds that, when nonorganically impaired retarded and nonretarded persons are similar in developmental level, they are also similar in the processes and concepts by which they reason. (Researchers distinguished between studies that excluded…
Descriptors: Cognitive Development, Comparative Analysis, Conservation (Concept), Hypothesis Testing