This study explores the intersection of media use, political discussion, and exposure to political difference through a focus on how Internet use might affect the overall heterogeneity of people's political discussion networks. Advanced and tested herein is the inadvertency thesis, which theorizes that limitations of selective exposure processes combined with weakened social boundaries found in the online environment suggest that people may be exposed to at least some additional political difference online, if only inadvertently. Hierarchical regression and mediation analyses confirm that online political discussion (directly) and online news (directly and indirectly) bear small yet significant relationships to the overall heterogeneity of political discussion networks, and that partisanship moderates the relationship between online political discussion and political discussion network heterogeneity.

This study examined the association between political ideology and linguistic indicators of integrative complexity and opinion leadership in U.S. political blog posts (N = 519). Using Linguistic Inquiry and Word Count (LIWC) text analysis, we found that the posts of conservative bloggers were more integratively simple than those of liberal bloggers. Furthermore, in support of a proposed opinion leadership model of integrative complexity, the relationship between ideology and integrative complexity was mediated by psychological distancing (an indicator of a hierarchical communication style). These findings demonstrate an ideological divide in the extent to which the blogosphere reflects deliberative democratic ideals.

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