Research on groups has been a major focus of concern among psychologists and sociologists for many years. The study of groups certainly deserves a central role in these disciplines since much of our behavior occurs in groups and many important social phenomena involve groups. Issues such as leadership, conformity, group decision-making, group task performance, and coalition formation have had a long history of research. However, recently a number of other areas of research have blossomed that provide interesting new perspectives on group processes (e.g., social impact). In addition, topics of research have developed outside the commonly ac cepted domain of group dynamics (e.g., self-disclosure) which seem to be concerned with rather basic group processes. Basic Group Processes was designed to bring together in one volume a repre sentative sample of the broad range of work currently being done in the area of groups. Some of the chapters provide a review of the literature while others focus more specifically on current programs of research. All, however, provide new insights into basic group processes and a number provide broad integrative schemes. All of the authors were asked to emphasize theoretical issues rather than a detailed presenta tion of research. Basic Group Processes suggests that research on groups is a lively enterprise and forging interesting new theoretical and empirical directions.