This is Chapter 10 of the book Creating Effective Organizations. This chapter covers Group Formation, Group Development, Characteristics of Effective Teams, Group Structure, Group Size, Social Density, Nature of the Task, Group Roles, Work Roles and Maintenance Roles, Role Episode, Group Norms, Development of Norms, Generally Accepted Norms, Norm Violation, Conformity, Levels of Conformity, Factors Influencing Conformity, The Effect of the Group on Individual Behavior, Social Facilitation, Social Loafing, and De-individuation.