meta-analyses conducted in various industries and types of performance teams (work, military, sport, educational, etc.) provide additional ground-based evidence that cohesion is related to performance. the authors of these meta-analyses (evans and dion found a positive correlation between cohesion and individual performance, but did not include group performance criterion measures. mullen and copper found that cohesion positively affects performance. they also found that this relationship was stronger in real teams verses ad hoc teams, in small teams verses large teams as well as in field studies. mullen and copper also noted that successful performance also promotes cohesion and numerous performance outcomes including individual and group performance, behavioral health, job satisfaction, readiness to perform, and absence of discipline problems.