Examines the development of young children's analysis of spatial patterns--specifically, hierarchical letter and geometric forms. Suggests that although children as young as four years of age demonstrated substantial analytic competence, their ability to integrate the parts of the spatial array to form a coherent whole was weaker and more easily…

A project to evaluate Furth's Inventory of Piaget's Developmental Tasks is described, particularly as that test might be useful in adapting instruction and curricula to the cognitive level of science students. This multiple-choice paper-pencil inventory has 72 items in five problem areas: conservation, images, relations, classification, and laws.…

Six studies investigated the use of pictorial material in a group setting to measure the cognitive level of children (age 7 to 11) on eight Piagetian concepts. Children were low to middle socioeconomic status with 60 percent Spanish surnames. Factor analysis and clinical administration supported test validity. (Author/CTM)

Two tests of cognitive development, the Cartoon Conservation Scales, Levels I and II, were designed to measure Piagetian stage-related constructs for children of different age groups. The tests were factor analyzed within age levels and were also analyzed using scalogram and tabular methods to test sequential hypotheses. (Author/CTM)

Adolescents, ages 11-12 and 13-14, were tested for maturity of judgment about stability-change situations and about time perspective. (CP)