Two influential theories of intellectual development are reviewed and analyzed: the psychometric framework, based on the factorial composition of intelligence, and the Piagetian model, based on assimilation and accomodation through four stages of intellectual development. A third concept is the componential theory of intelligence, based on…

Whether "psychometric" and "Piagetian" kinds of intelligence are similar is a question of whether they have similar courses of development with age. When using factor analysis to address this issue, age effects must be eliminated in order to assess relations among measured constructs. Reanalyses of previous results were…

The proceedings of the University Affiliated Program's Second Special Interdisciplinary Seminar, concerning Piagetian theory, are presented. The opening session dealt with the question "Can Piaget's Theory Provide a Better Psychometry?", C. E. Meyers, speaker. Among the papers reprinted in the proceedings from the afternoon program of…