Several years ago, two of my colleagues and I had the opportunity to interview Fritz Heider-perhaps the most influential theorist in the field of social psychology (Harvey, Ickes, & Kidd, 1976). During our interview, Heider affirmed a belief that had guided his career since the 1920s, the belief that the study of human relationships is the most important task in which social scientists can engage. Although many social scientists would profess to share this belief, it is nonetheless true that the study of human relationships has been one of the most neglected tasks in the history of the social...

Personality and Roles: Sources of Regularities in Social Behavior For behavioral scientists, whether they identify primarily with the science of psychology or with that of sociology, there may be no challenge greater than that of discovering regularities and consistencies in social behavior. After all, it is such regularities and consistencies that lend predictability to the behavior of individuals in social contexts-in particular, to those events that constitute dyadic interactions and group processes. In the search for behavioral consistencies, two theoretical constructs have emerged as...