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McManis, Donald L. – Amer J Ment Deficiency, 1970
Descriptors: Cognitive Processes, Conservation (Concept), Exceptional Child Research, Logical Thinking
Brainerd, Charles J. – 1974
Studies concerned with the synchronous emergence prediction of Piaget's structures-of-the-whole principle are discussed in conjunction with three groups of concrete-operational skills: (1) transitivity/conservation/class inclusion; (2) double classification/double seriation; and (3) ordinal, cardinal, and natural number concepts. Findings show…
Descriptors: Abstract Reasoning, Children, Classification, Cognitive Processes