Competition within groups mirrors cooperation outgroup competition fosters binding.

Evidence

But before the study ended, Sherif and colleagues made two other important observations. First, they noted that intergroup competition increased morale, cohesiveness, and cooperation within each group, suggesting that intragroup cooperation and intergroup competition are two sides of the same coin (see replication by Blake & Mouton, 1962). Second, they found that creating a situation of interdependence by giving both groups a shared superordinate task (like fixing their broken down means of transportation) served to decrease competition and to increase cooperation across group boundaries. Just as competition creates conflict, cooperation breeds liking. — John T. Jost and Jim Sidanius, Political Psychology, 136 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Repeated interaction among courtroom workgroup members promotes cooperative plea bargaining — G. Alan Tarr, Judicial Process and Judicial…, 1784; Collectivist frames pair in-group generosity with out-group competition as one package. — Leonard S. Newman and Ralph Erber (eds.), Understanding Genocide: The Social…, 1025; Intergroup competition boosts intragroup cohesion while shared tasks restore cooperation — John T. Jost and Jim Sidanius, Political Psychology, 136 (+10 more)

Broader Connections

• Intergroup competition boosts intragroup cohesion while shared tasks restore cooperation #corroborates (0.95) — John T. Jost and Jim Sidanius, Political Psychology, 136
• Intergroup cooperation unravels because free-riding and competition outcompete collective benefit. #complicates (0.78)