“…Previous research has shown that pretty much every aspect of citizens' political attitudes, behavior, and knowledge is heavily influenced by social environments (for overviews, see, e. g., Huckfeldt, 2007;Schmitt-Beck and Lup, 2013) and, hence, there is no reason to assume that media bias perceptions would not be. We considered attitudes (strength of party identification, ideology) and discussion agreement as well as other factors (political sophistication, network size, frequency of political discussion) with the potential to explain how citizens process and understand political information via the media, thereby going beyond previous studies that only take into account individual-level explanations (Matthes, 2013;Oh, Park, and Wanta, 2011). We also made use of data on the perceived party preference of outlets, which provides sources' general ideological outlook and is less context-sensitive than previous approaches relying on issue position (Hartman and Tanis, 2013;Wojcieszak, 2017).…”