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Jacobson, Leonard I.; And Others – Child Development, 1971
Descriptors: Cognitive Processes, Concept Formation, Economically Disadvantaged, Intellectual Development

Ferrara, Roberta A.; And Others – Child Development, 1986
Two studies examined the relation between current developmental levels, as estimated by IQ, and proximal levels of development, as estimated by the efficiency of learning and transfer in assisted contexts. Subjects were 8- to ll-year-old children. Theoretical and clinical implications are discussed. (HOD)
Descriptors: Abstract Reasoning, Age Differences, Children, Cognitive Development