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	Sport Spectator Identification Scale	Points of Attachment Index
Field	Sport Leisure Studies	Sport Leisure Studies
Family	Latent structure	Latent structure
Year of origin	1993	2003
Originator	Daniel L. Wann & Nyla R. Branscombe	Galen T. Trail, Matthew J. Robinson, Ronald J. Dick & Andrew J. Gillentine
Type	Single-factor self-report psychometric scale	Multidimensional latent-construct measurement scale
Seminal source	Wann, D. L., & Branscombe, N. R. (1993). Sports fans: Measuring degree of identification with their team. International Journal of Sport Psychology, 24(1), 1-17.	Trail, G. T., Robinson, M. J., Dick, R. J., & Gillentine, A. J. (2003). Motives and Points of Attachment: Fans Versus Spectators in Intercollegiate Athletics. Sport Marketing Quarterly, 12(4), 217-227.
Aliases	SSIS, Sport Spectator Identification, Team Identification Scale	PAI, Points of Attachment Scale, Multidimensional Sport Attachment Measure, Trail Points of Attachment
Related	3	4
Summary	The Sport Spectator Identification Scale (SSIS) is a seven-item self-report measure of how strongly a fan psychologically identifies with a particular sports team. Daniel Wann and Nyla Branscombe introduced it in 1993 in the International Journal of Sport Psychology, grounding it in social identity theory: a fan who identifies with a team incorporates that team into the self, so the team's successes and failures are experienced as the fan's own. The scale asks respondents, with reference to a team they name, how important it is that the team wins, how strongly they see themselves as fans, how closely they follow the team, and related questions, each rated on an eight-point Likert format and summed into a single identification score. Because team identification predicts a wide range of fan behaviors and well-being outcomes, the SSIS became the standard short instrument for measuring it and the workhorse of decades of sport fan research.	The Points of Attachment Index (PAI) is a multidimensional measurement instrument, developed by Galen Trail, Matthew Robinson, Ronald Dick, and Andrew Gillentine in 2003, that captures the several distinct objects to which sport fans become psychologically attached. Where earlier work treated fan identification as attachment to the team alone, the PAI recognizes that an individual may identify with the players, the coach, the surrounding community, the sport itself, the university or organization, and the level of sport, in addition to the team. Each of these objects is measured as a separate reflective latent factor through multi-item survey scales and validated with confirmatory factor analysis. Robinson and Trail's 2005 study extended the index, showing how these points of attachment relate to spectator motives, gender, and sport preference, and how they differentially predict attendance, loyalty, and consumption behavior.