Combines an emphasis on research, empirical studies supporting theoretical understanding of groups, and extended case studies to deliver the most comprehensive treatment of groups available.

Includes bibliographical references (pages 579-666) and indexes.

Introduction to group dynamics -- Studying groups -- Inclusion and identity -- Formation -- Cohesion and development -- Structure -- Influence -- Power -- Leadership -- Performance -- Teams -- Decision making -- Conflict -- Intergroup relations -- Groups in context -- Growth and change -- Crowds and collectives.