University Sports Rivalries Provide Insights on Coalitional Psychology : Territorial Context Influences Reactions to Vocal Signals of Allegiance.

Sports are an excellent venue for demonstrating evolutionary principles to audiences not familiar with academic research. Team sports and sports fandom feature dynamics of in-group loyalty and intergroup competition, influenced by our evolved coalitional psychology. We predicted that reactions to expressions signaling mutual team/group allegiance would vary as a function of the territorial context. Reactions should become more prevalent, positive, and enthusiastic as one moves from the home territory to a contested area, and from a contested area to a rival's territory during active rival engagement. We also predicted that men would be more responsive than women based on sex differences in evolved coalitional psychology. The research team visited public places immediately prior to 2016-2017 collegiate football and basketball games. A male research confederate wore a sweatshirt displaying the logo of one of the competing university teams and vocalized the team's most popular slogan when he saw a fan displaying similar logos. Observers followed 5 m behind, recording reactions (N = 597) and response positivity/enthusiasm. Reaction tone was most positive in the rival territory, least positive in the home territory, and intermediate in the periphery and contested territory. Rates of "no reaction" were lowest in the rival territory but were highest in the periphery. Men had higher reaction rates and more positive and enthusiastic reaction tones than women. Reactions generally followed predictions based on expected signal value. This project provides evidence that coalitional psychology influences dynamics related to university sports team rivalries and that context matters for expressions of alliance.