A study investigated developments in reasoning and memory as reflected by the discovery strategies of children taking part in a manipulative categorization and recall task. A total of 40 children (8 each of 18, 24, 30, 36, and 42 months of age) participated. Stimulus materials consisting of blocks, toy plates, discs, and plastic trees were…

This summarizes a study designed to provide a basis for researchers who study measurable areas of human performance or attempt to conceptualize and develop a theory and structure of abilities. Specifically, this study was directed toward the identification of tests that can serve as markers for well established cognitive factors. (Author/CTM)

Thirty-five tests which measure cognitive abilities at the intermediate grade level and the related manual are intended to accompany the authors' 1973 monograph, "A Structure of Concept Attainment Abilities." Additional tests which measure these abilities (verbal, induction, memory, spatial, numerical, perceptual speed, evaluation, word fluency,…