The document describes the development and validation of the Sport Rivalry Fan Perception Scale (SRFPS). It involved conducting interviews to identify factors related to how fans perceive rival teams. An initial list of 112 statements was created and refined through expert review. The statements were tested on samples of sports fans and analyzed using exploratory factor analysis to identify the underlying factors. This resulted in a 15-item, 4-factor scale that measures perceptions of a favorite team's rival. The scale development process followed established methods to ensure the scale's reliability and validity in quantitatively measuring the construct of sport rivalry from a fan's perspective.