Group Performance outlines the current state of social psychological theories and findings concerning the performance of groups. It explores the basic theories surrounding group interaction and development and investigates how groups affect their members. "Bernard Nijstad is one of the 'young lions' of this field and has made substantial contributions to a number of the content areas covered in the book. Group Performance handles the conceptual and empirical material very well, leaving the reader with a good sense of what we currently know about the psychology of behavior in and by groups.Overall an excellent introduction to the area."-R. Scott Tindale, Loyola University, Chicago, USA "Bernard Nijstad, a brilliant and enthusiastic researcher, provides a comprehensive, cutting-edge perspective on a fascinating area of social psychology. This textbook will be a classic. I seriously could not stop reading it until the very last page. Highly recommended!"- Andreas Mojzisch, Institute of Psychology, University of Goettingen, Germany "Professor Nijstad does a fantastic job integrating both classic and contemporary research on group performance. I was particularly impressed with Nijstad's ability to translate this literature in a well-organized and proficient manner. Nijstad's enthusiasm for this work should help generate excitement in students reading about this topic for the first time."- Robert B. Lount, Jr., The Ohio State University, USA