In recent years, researchers have begun to focus attention on postformal thought--the development of thought in late adolescence and adulthood--questioning Piaget's early terminus of structural development in adolescence. This volume brings together the works of distinguished authors in the field of postformal-operational cognitive, social, and perceptual development to examine the models and methodology used to investigate postformal thought. The contributors represent the variety of approaches that characterize this body of research, while, at the same time, seeking to unify this diverse literature with a common language. An ideal text for advanced courses in adult development, this volume is also a primary reference for developmental and educational psychologists and students working in the fields of cognitive development, adolescent and adult development, and lifespan development. Divided into four parts, the volume begins by examining both Piagetian and nonstructural models of adult cognitive development, considering them in light of current research developments. Individual papers address models of equilibrium, knowledge, reflective judgment, ego-development, and consciousness. In Part II, the contributors discuss the measurement and comparison of cognitive development in adults, exploring such topics as construct validity and theories of adult development, the structural and developmental relations between formal and postformal capacities, and the relationship between Piagetian and Kohlbergian stages. The third section assesses the research and theory of adult reasoning in the moral domain, while the concluding chapter investigates critical evaluations of postformal research.Numerous tables and figures enhance the discussions.

In recent years, a number of researchers have begun to question the Piagetian theory that cognitive structural development ends with the adolescent's acquisition of formal operations and have begun to focus on the development of thought in late adolescence and adulthood. This volume brings together the work of numerous scholars in cognitive social, and perceptual development to explore the nature of postformal thought. The contributors represent the diversity of models and approaches that characterize the ongoing research in this area and, at the same time, act to unify this body of literature within a common framework of analysis. Students, researchers, and practicing psychologists will find her important new insights into the evolution of thought processes throughout the human lifespan.

A number of the papers present alternative, but closely related models of postformal cognition, as well as techniques of measuring postformal thought. Of special interest is the presentation of data supporting claims that thought represents a stage qualitatively distinct from the transition between hierarchical and formal operations. The opening chapter describes Beethoven's cognitive development in late adolescence and adulthood, while subsequent essays discuss the modifications of formal structures that develop in the attempt to use formal reasoning in real-life problem solving. A set of studies that extend the study of postformal thought into the domains of moral thought and social reasoning complete the volume.