Social Psychology is an important interdisciplinary field within Sociology. Psychology, focusing on processes that occur inside the individual and Sociology, focusing on social collectives and social institutions, come together in social psychology to explore the interface between the two fields. Social Psychology is the study of how both intra-individual factors and social interaction influence and are influenced by individual behavior. The core concerns of social psychology include: - the impact of one individual on another; - the impact of a group on its individual members; - the impact of individuals on the groups in which they participate; - the impact of one group on another. This successor to Social Psychology: Social Perspectives and Sociological Perspectives in Social Psychology expands on previous handbooks in social psychology by including recent developments in theory and research and SUBSTANTIAL COVERAGE of major theoretical perspectives. A major reference work and a seminal text, it is essential reading for sociologists and psychologists involved with the study of social psychology and those studying this field of research.