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McGillicuddy-De Lisi, Ann V.; De Lisi, Richard – International Journal of Behavioral Development, 1981
Seventy-five children, 6 to 13 years of age, were assigned to one of five groups on the basis of Piagetian tests of spatial-geometrical knowledge. Subjects imagined and executed three transformations of geometric figures: square-enlargement, diamond enlargement and transformation of a small diamond into a large square. (CM)
Descriptors: Cognitive Ability, Developmental Tasks, Elementary Education, Elementary School Students