Research on online misinformation has evolved rapidly, but organizing its results and
identifying open research questions is difficult without a systematic approach. We present …

We are witnessing increasing partisan polarization across the world. It is often argued that
partisan “echo chambers” are one of the drivers of both policy and affective polarization. In …

Growing concern surrounds the impact of social media platforms on public discourse,,–and
their influence on social dynamics,,,–, especially in the context of toxicity,–. Here, to better …

Social media is often criticized for amplifying toxic discourse and discouraging constructive
conversations. But designing social media platforms to promote better conversations is …

Recommender systems are the algorithms which select, filter, and personalize content
across many of the world's largest platforms and apps. As such, their positive and negative …

Mounting evidence indicates that the artificial intelligence (AI) systems that rank our social
media feeds bear nontrivial responsibility for amplifying partisan animosity: negative …

Low uptake of the COVID-19 vaccine in the US has been widely attributed to social media
misinformation. To evaluate this claim, we introduce a framework combining lab experiments …

Social norms have long been considered across the social and behavioral sciences for their
effects on human behavior. This review focuses on norms that explicitly or implicitly convey …

Prior research demonstrates that news-related social media posts using negative language
are re-posted more, rewarding users who produce negative content. We investigate whether …

Existing studies of political polarization are often limited to a single country and one form of
polarization, hindering a comprehensive understanding of the phenomenon. Here we …