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Download full textDanner, Fred W.; Day, Mary Carol – 1975
There is considerable disagreement concerning the age of onset and universality of attainment of Piaget's stage of formal operations. This study examines developmental differences in response to brief prompts in the use of a formal operational approach to the solution of two tasks. The subjects were 10 males and 10 females from each of Grades 5,…
Descriptors: Adolescents, Cognitive Processes, Developmental Psychology, Developmental Tasks
Gray, William M.; Hofmann, Richard J. – 1976
A major premise of Piagetian theory relative to the periods of concrete and formal operations is that competence in specific logical operations is a necessary but not sufficient prerequisite to competence in other specific logical operations. The present study tested for the existence of specific concrete operations and specific formal operations…
Descriptors: Cognitive Processes, Data Analysis, Deduction, Developmental Psychology
