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Strahan, David B. – 1986
This paper reviews some literature on the emergence of formal reasoning and reports a study of reasoning performance of 213 middle grade students in relationship to grade level and chronological age. While a number of large-scale studies have indicated that formal reasoning emerges in a regular progression across age ranges and grade levels, few…
Descriptors: Abstract Reasoning, Adolescents, Chronological Age, Cognitive Development
