This timely, comprehensive analysis of the latest advances in group processes research shows how cutting edge technologies, such as laboratory experiments, simulations, and complex systems combine with the rigor of cumulative research programs to change the way we see the social world. Group processes researchers study society scientifically, and have used sociological theory to build scientific, cumulative knowledge about the social world. Over the last 20 years, they have been extremely successful in advancing this knowledge through the reciprocal interplay of theory and experiment. The...