Perceiving Affective Polarization in the United States: How Social Media Shape Meta-Perceptions and Affective Polarization

Affective polarization is on the rise, not least in the United States. Recent scholarship has identified meta-perceptions, concerning how much opposing partisans think they dislike each other, as a potential driver of actual interparty animosity. I theorize that social media content shapes people’s political meta-perceptions, which in turn influence affective polarization. I integrate prior work on meta-perceptions with research on intergroup conflict and social norms to distinguish perceptions about people’s ingroup from perceptions about their outgroup. A probability sample (n = 825) shows outgroup meta-perceptions (i.e., perceptions about the outparty’s feelings toward the inparty) are linked to actual affective polarization. Ingroup meta-perceptions do not predict affective polarization above and beyond outgroup meta-perceptions. An original experiment (n = 541) then examines the proposed causal pathway by exposing subjects to politically unifying, divisive, or neutral media content. In line with the proposed model, unifying content reduces affective polarization, and this effect is mediated by political meta-perceptions. Surprisingly, divisive content has no effects on meta-perceptions or affective polarization. These findings have theoretical implications for research on social media, perceptions, and intergroup relations. These, as well as practical implications, are discussed in light of mounting concerns about increasing affective polarization and the role social media may play in exacerbating it.