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 FeaturesExamines the major criteria used by researchers to define groupsConveys what behavioral scientists know and theorize about how people think, feel, and act when responding to ingroup and outgroup membersDiscusses perspectives on what happens within groups and between groupsKey ThemesCognitions and FeelingsConflict and Cooperation Within GroupsGroup Decision MakingGroup Performance and Problem SolvingGroup StructureIdentity and SelfInfluence and PersuasionIntergroup Relations in SocietyMethodologyOrganizationsTheoryTypes of Groups and Subgroups