Constructed and tested a measure of sports team identification in 2 studies with a total of 546 undergraduates. Several behavioral, affective, and cognitive reactions among sports spectators were used to validate the team identification measure. Ss who strongly identified with a specific sports team, relative to those spectators moderate or low in identification, reported more involvement with the team, displayed a more ego-enhancing pattern of attributions for the team's successes, had more positive expectations concerning future team performances, exhibited greater willingness to invest larger amounts of time and money to watch the team play, and were more likely to believe that fans of the team they are identified with possess special qualities.(French, Spanish, German & Italian abstracts)(PsycInfo Database Record (c) 2022 APA, all rights reserved)