AI 中文总结
研究通过NFL推文语料库，衡量地理、比赛结果等因素对球队情感的影响，估算粉丝圈半径，发现比赛前后球队情感变化轨迹及情感与胜率的关系，为计算社会科学研究粉丝圈提供了量化成果。
AI 中文摘要
在线粉丝圈会影响公众对电影、音乐家和运动队的看法。通过使用包含比赛相关推文的语料库，我们衡量了2011 - 2014年美国国家橄榄球联盟（NFL）赛季中，受地理、比赛结果和球队表现影响的各球队情感变化。我们估算了每支球队的粉丝圈半径，确定了参与度超过背景讨论水平的区域。发现比赛前，输赢球队的情感都是积极的，开球时下降，中场休息时略有反弹。但中场休息后轨迹不同：赢队情感在比赛结束时上升，输队情感则一直很低，且最终都低于比赛开始时的水平。最后，情感与胜率比较显示出弱正相关，表明球队成功虽有助于粉丝圈的活跃度，但其他因素也影响粉丝在社交媒体上讨论NFL的方式。我们的工作为量化现代粉丝圈诸多方面的计算社会科学研究增添了内容。
英文摘要
Online fandom communities influence public opinion toward movies, musicians, and sports teams. Using a corpus of game-referencing tweets, we measure variation in sentiment toward National Football League (NFL) teams driven by geography, game outcomes, and team performance for the 2011--2014 NFL seasons. We estimate a fandom radius for each team, identifying regions where engagement exceeds background levels of discussion. We find sentiment for both winning and losing teams is positive immediately prior to games, drops at kickoff, and rebounds slightly during halftime. After halftime however, the trajectories diverge: Sentiment for winning teams increases toward the end of the game, while sentiment for losing teams remains low, though both end up below their start of game levels. Finally, a comparison between sentiment and win percentage reveals a weak positive relationship, suggesting that while team success contributes to fandom happiness, other factors also influence how fans discuss the NFL on social media. Our work contributes to a growing body of computational social science research that quantifies the many aspects of modern fandom.
