Book excerpt: This is the definitive textbook on the practical and theoretical significance of the group in sport and exercise settings. With new and updated chapters, the third edition presents the most current analyses and information on collective efficacy, team goal setting, the nature of status in sport teams, team building, and a host of other group factors critical to sport performance and exercise participation. The lead author, Dr Bert Carron, is recognised as the worlds foremost authority on group dynamics in sport. This textbook is essential reading for students enrolled in sport psychology and sport sociology courses.