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Webb, Roger A.; Daurio, Stephen P. – 1975
This study examined the transition from concrete to formal operations in very bright children in an effort to determine whether high ability in concrete operations would carry over into formal operational ability, and also to investigate precocity in regard to formal operations. Subjects were 38 white middle-class children ranging in age from…
Descriptors: Abstract Reasoning, Adolescents, Age Differences, Children
Klausmeier, Herbert J.; And Others – 1976
The Conceptual Learning and Development (CLD) Model specifies four levels of concept attainment (concrete, identity, classificatory, and formal) and three uses of concepts (problem solving, subordinate-supraordinate, and principles). Longitudinal and cross-sectional studies of concept attainment may be conducted. The results of this study of 300…
Descriptors: Abstract Reasoning, Age Differences, Cognitive Development, Cognitive Measurement