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Slater, A. M.; Kingston, Denise J. – British Journal of Educational Psychology, 1981
Seven-year-olds and university students were questioned about hidden or visible colored counters. Under certain testing conditions, the children were able to demonstrate one of the major characteristics of formal operational thought, namely the ability to reason in terms of verbally stated hypotheses without reliance on direct, physical…
Descriptors: Abstract Reasoning, Cognitive Development, College Students, Competence