One way or another? Discussion disagreement and attitudinal homogeneity on social networking sites as pathways to polarization in Czechia

This study focuses on social networking sites and their role in partisan-based affective polarization and political antagonism. We examine the relationship by testing variables that indicate selective exposure to counter-attitudinal and pro-attitudinal information. The results from Czech survey data (n = 2,792) collected in 2020 show a positive relationship between both perceived discussion disagreement and attitudinal homogeneity of the network to political antagonism, and a positive relationship between the perceived attitudinal homogeneity of the network and affective polarization. The results thus question the existence of a single universal social media use pattern contributing to polarization.