Group cohesiveness refers to the bonding and attachment felt by group members towards one another and the group as a whole. It depends on many factors such as compatibility of individual and group goals, group size, external pressures, past experiences, success, physical proximity, dependency, leadership, and location. Smaller groups tend to be more cohesive due to greater interaction and communication opportunities. External threats from outside the group can increase cohesiveness by unifying members to face a common enemy. A history of successful goal achievement and high status also contribute to stronger cohesiveness.