Machine derived contents note: Part 1. Theory and Practice -- Introduction -- Group Formation and Development -- A Theory of Group Development -- Group Dynamic and the Individual -- Functional Roles of Group Members -- How to Diagnose Group Problems -- Improving Decision-Making with Groups -- The Case of the Hidden AgAnda -- Stereotypes and the Growth of Groups -- The Group as a Growing Organism -- Applying a Group Development Model to Managing a Class -- Part 2. Research -- Introduction -- Informal Communication in Small Groups -- Task Roles and Social Roles in Problem-Solving Groups -- Personal Goals and the Group's Goals for the Member -- Trust and Managerial Problem Solving -- Assets and Liabilities in Group Problem Solving: The Need for an Integrative Function -- Small Group Behavior: A Selective Bibliography