This article reviews the empirical evidence on the relationship between social media and political polarization. We argue that social media shapes polarization through the following social, cognitive, and technological processes: partisan selection, message content, and platform design and algorithms.

中文翻译：

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社交媒体如何塑造两极分化

本文回顾了关于社交媒体与政治两极分化之间关系的经验证据。我们认为，社交媒体通过以下社交、认知和技术过程塑造两极分化：党派选择、消息内容以及平台设计和算法。