Costs and benefits of allegiance: Changes in fans' self-ascribed competencies after team victory versus defeat.

Two studies examined the effect of game outcome on sports fans' estimates of the team's as well as their own future performance. Consistent with social identity theory, it was expected that Ss for whom fanship was an important identity would respond to team success and failure as personal success and failure. Ss watched a live basketball game; then, in the context of a second, unrelated experiment, Ss estimated their own performance at several tasks. Results indicated that fans' mood and self-esteem were affected by game outcome. More important, fans' estimates of both the team's and their own future performance were significantly better in the win than in the loss condition