This document discusses key concepts relating to group dynamics and team effectiveness. It covers common concerns people have when entering new groups, such as establishing their identity, influence, needs and acceptance. It also outlines stages of group development and conditions necessary for team success, including interdependence, leadership, joint decision making and equal influence. The document contrasts task and process dimensions in groups and how cohesiveness and productivity are interrelated. It provides strategies for promoting cohesiveness and lists characteristics of an effective team.