The seventeen contributions to this volume demonstrate the enormous progress that has been achieved recently in our understanding of emotions. Current cognitive formulations and information-processing models are challenged by new theory and by a solid body of empirical research presented by the distinguished authors. Addressing the problem of the relationship between developmental, social and clinical psychology, and psychophysiology, all agree that emotion concepts can be operationally defined and investigated as both independent and dependent variables. Cognitive and affective processes can no longer be studied in isolation; taken together, the chapters provide a useful map of an increasingly important and active boundary.