Argues that evidence for radical discontinuities between underlying organizations at different stages is often equivocal and that polarization of views concerning continuities and discontinuities in development may impede understanding. Specifically discusses major reorganizations, behavioral evidence for reorganization during development,…

Addresses four major issues in developmental psychology: the preservation of structures over time; the psychological growth functions for emergent competences; the mechanisms of change in development; and the determinants of individual variation in psychological development. (Author/DB)