There are several key properties that shape group behavior:
1. Roles define expected behaviors for group members. Norms establish acceptable standards for behaviors.
2. Status differentiates members based on power, contributions, and characteristics. It affects conformity and interactions.
3. Group size impacts performance, problem solving, and social loafing. Small groups are better for speed and individual work while large groups support fact-finding.
4. Cohesiveness is the attraction between members and motivation to stay together. Increasing time together, competition, and rewards can boost cohesiveness.