Contributed by psychologists and others mainly from the US, the 12 chapters in this volume explore various aspects of team dynamics over time. They cover conceptual foundations, such as team composition and adaptation, measuring collaborative problem-solving skills over time, and predictors of team dynamics; special topics like the functional behavior of leaders over time, team trust development and maintenance, factors and threats to team dynamics in long-duration extreme environments, collaborative problem solving and team development, the influence of culture, and verbal communications as a predictor of team dynamics; and challenges and new directions in examining team cohesion over time and temporal dynamics in multiteam systems.