Argues that the status of the concept of equilibration is classified by considering Piagetian theory as a research program in the sense elaborated in 1974 by Lakatos. A pilot study was made to examine the precision and testability of equilibration in Piaget's 1977 model.(Author/RH)

An examination of the concept of external validity from two theoretical perspectives: a traditional mechanistic approach and a dialectical organismic approach. Examines the theoretical and methodological implications of these perspectives. (BD)

This article attempts to clarify the Schaie-Baltes controversy dealing with the formulation of adequate developmental research design. Crucial to clarification is distinguishing between description and explanation of developmental change. (MS)

Examines current conceptualizations of the mechanisms used to explain cognitive and social development and possible common mechanisms linking the two areas. Considers these mechanisms for both a mechanisric and the two areas. Considers these mechanisms from both a mechanistic and an organismic perspective. Presents a developmental model which…

This paper represents a call for the rehabilitation and liberalization of the term learning. Preliminary steps for a revived theory of development and learning are described, including a consideration of such topics as compatibility or naturalness, accessibility and flexibility of learning, and processes of induction. Specific recommendations for…