Discusses the legitimacy of the use of multiple definitions of epigenesis in developmental psychology, and of the modification of biological models to suit developmental psychology. (Author/SS)

Evaluates the differing perspectives of Kohlberg and Turiel on moral reasoning. Both perspectives use stage displacement models to depict moral development and assume that as ontogenesis proceeds, the role played by earleir acquired moral stages becomes increasingly insignificant in comparison with the role played by more advanced stages. The…

Discusses research in creativity with particular emphasis on the problems encountered in assessing creativity from a life-span developmental framework. Alternative developmental models and measures are discussed as future research recommendations for the assessment of life-span creativity. (Author/RH)

Outlines Piaget's late ideas on categories and morphisms and the impact of these ideas on the comprehension of the inclusion relationship and the solution of arithmetic problems. Reports a study in which fourth through sixth graders were given arithmetic problems involving two known quantities associated with changes rather than states. Identified…