Proposes an extension of multivariate, structural analyses for studying organism-environment interactions. Based on characteristics of the assumed feedback mechanisms between behavioral and environmental systems, it appears possible to analyze longitudinally ordered sequences in terms of recursive versus nonrecursive and distal versus proximal…

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)

Piaget's last two works may add a new level of coherence and generality to his theories, which are grounded in an insight about the interdependence of reality and knowledge about reality. Piaget expanded Kant's epistemology to encompass three systems operating in the frames of biology, psychology, and culture. (MDM)

The philosophies underlying the learning and structural theories used in psychology are described in this article. It is argued that a dialectical view provides some ways to breach the chasm between learning theory and the study of human development. (Author/DB)

Piaget's last writings in the 1980s and early 1990s contained both a coherent constructivist account of explanation in science and specific suggestions for revising the logic of operations as a logic of meanings. Demonstrates the interdependence of these two aspects of his work by examining the merits of Piaget's revised logical competence model…

Describes the methodological and statistical criteria neccessary for adequate measurement of organism-environment correlations and presents a path anaysis model as an approach to the study of these correlations. (BD)

Determines patterns of differential human development in a longitudinal study of 417 male and 358 female college students ages 18 to 30. Findings suggest individuality in development is associated with significant qualitative individual differences that are best described on a cross-time basis. (BJD)

Argues that a better understanding of developmental processes is provided by three types of operant research -- laboratory behavioral descriptions, descriptions of naturalistic behavior-environment interdependencies, and predictive naturalistic studies. The usefulness of these processes are examined in light of the goals of life span developmental…

Presents an alternative conceptual model of Reflection-Impulsivity. The alternative dimension delineates both a cognitive style and a cognitive efficiency dimension. A methodological alternative for use with the model is also presented. (BD)

Criticizes the operant approach to the study of life span development from a theoretical behaviorism view. It is argued that the operant approach is too limited in its scope to enhance significantly the conceptualization and understanding of life span development. (Author/DB)