Studies have found limited evidence consistent with the theory that partisan and like-minded online news exposure have demonstrable effects on political outcomes. Most of this prior research, however, has focused on the particular case of the United States even as concern elsewhere in the world has grown about political parallelism in media content online, which has sometimes been blamed for heightened social divisiveness. This article investigates the impact of online partisan news consumption on voting behavior and social polarization during the 2022 elections in Brazil, a country where the public’s ties to political parties have historically been more limited or nonexistent but where ideologically aligned news content online has markedly increased in recent years. Drawing on a unique dataset linking behavioral web-tracking data of 2,200 internet users in Brazil and 4 survey waves with the same respondents, conducted before, during, and after the 2022 presidential elections, we find no significant relationship between the use of partisan media on either vote choice or social polarization overall; however, we do find some weak and inconsistent effects of trust in news moderating the impact of partisan media on social polarization.

中文翻译：

---

接触党派新闻及其对社会两极分化和投票选择的影响：来自 2022 年巴西选举的证据


研究发现，与党派和志同道合的在线新闻曝光对政治结果有明显影响的理论相一致的证据有限。然而，这些先前的大部分研究都集中在美国的特殊案例上，尽管世界其他地方对在线媒体内容中的政治平行性越来越担忧，这有时被指责为加剧社会分裂的原因。本文调查了巴西 2022 年选举期间在线党派新闻消费对投票行为和社会两极分化的影响，该国公众与政党的联系历来更加有限或不存在，但近年来在线意识形态一致的新闻内容显着增加。利用一个独特的数据集，将巴西 2,200 名互联网用户的行为网络跟踪数据与 2022 年总统选举之前、期间和之后进行的 4 次调查与相同受访者联系起来，我们发现党派媒体在投票选择或整体社会两极分化方面的使用之间没有显着关系;然而，我们确实发现，对新闻的信任会缓和党派媒体对社会两极分化的影响。