Study suggests that an individual's preferred ways of perceiving and thinking reflect an integral aspect of his personality, and that a full knowledge of the one is essential to a full understanding of the other. (Author)

Piaget's model of children's conceptual learning and development was compared with Klausmeier's Conceptual Learning and Development (CLD) model in a longitudinal study. The CLD model suggests four successive levels of concept learning: (1) concrete--recognizing an object which has been encountered previously; (2) identity--recognizing a known…