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McMurray, N. E.; And Others – Journal of Educational Psychology, 1977
Performance of over 200 third and fourth graders on a post test and a two-month follow-up measure showed that groups receiving lessons based on a task analysis instructional design performed significantly better than groups receiving placebo lessons at two levels of advanced mastery for the concepts, "equilateral triangle" and…
Descriptors: Cognitive Development, Concept Formation, Developmental Stages, Elementary Education