Developmental change in self-esteem was assessed from early adolescence through early adulthood. Found that males tended to increase and females to decrease in self-esteem over time and that there was rank order consistency in self-esteem over time. Within each gender, individuals' differences in developmental trajectories were related to…

Specifies some problems in the Piagetian characterizations of assimilation and accommodation and offers an alternative formulation intended to resolve some conceptual anomalies. On the basis of the revision, the orthogenetic law of developmental progression is explicitly derived. Further, Piaget's notion of "equilibrium" is extended into…