Over the past 75 years there has been a tremendous amount of theoretical and empirical research on group processes and intergroup relations by scholars in various disciplines. The Encyclopedia of Group Processes and Intergroup Relations is a reflection of the growing integration of what were formerly two distinct approaches. With approximately 300 entries, the two volumes of this encyclopedia cover concepts ranging from conformity to diversity and from small group interaction to intergroup relations on a global scale. Key Features Examines the major criteria used by researchers to define groups Conveys what behavioral scientists know and theorize about how people think, feel, and act when responding to ingroup and outgroup members Discusses perspectives on what happens within groups and between groups Key Themes Cognitions and Feelings Conflict and Cooperation Within Groups Group Decision Making Group Performance and Problem Solving Group Structure Identity and Self Influence and Persuasion Intergroup Relations in Society Methodology Organizations Theory Types of Groups and Subgroups