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Scholars have debated whether social media platforms, by allowing users to select the information to which they are exposed, may lead people to isolate themselves from viewpoints with which they disagree, thereby serving as political "echo chambers." We investigate hypotheses concerning the circumstances under which Twitter users who communicate about elections would engage with (a) supportive, (b) oppositional, and (c) mixed political networks. Based on online surveys of representative samples of Italian and German individuals who posted at least one Twitter message about elections in 2013, we find substantial differences in the extent to which social media facilitates exposure to similar versus dissimilar political views. Our results suggest that exposure to supportive, oppositional, or mixed political networks on social media can be explained by broader patterns of political conversation (i.e., structure of offline networks) and specific habits in the political use of social media (i.e., the intensity of political discussion). These findings suggest that disagreement persists on social media even when ideological homophily is the modal outcome, and that scholars should pay more attention to specific situational and dispositional factors when evaluating the implications of social media for political communication.

This article evaluates the potential that Twitter affords politicians to communicate to citizens directly, through messages that they broadcast to users who follow them, and indirectly, to the extent that their followers autonomously re-circulate politicians’ messages to their own contacts. Analysis of more than 2 million accounts of followers of 10 national party leaders during the Italian 2013 general election campaign shows that most users are rather inactive and have very small followings. Moreover, the most followed politicians have on average the least active and followed users, and vice versa. Users’ activity and followings are also unevenly distributed, with very tiny minorities accounting for the vast majority of tweets and followers. The most followed followers of politicians are celebrities in realms other than politics, or people who are already highly visible in the politics-media ecosystem. Our findings suggest that most of the potential for indirect communication may lie in the “vital middle” of the Twitter population who are more active than average, but are not part of the restricted elite of high-impact outliers.

Mobile instant messaging services (MIMS) are emerging as important digital environments in citizens' everyday lives. We explore the use of MIMS for talking about politics with unique survey data on samples representative of internet users in Germany, Italy, and the United Kingdom. First, we show that robust percentages of our respondents who use MIMS employ them for posting political messages and discussing politics. Secondly, we demonstrate that political talk on MIMS is positively associated with users' tendency to censor themselves politically on social networking sites (SNS) and, to a lesser extent, with ideological extremism. Thirdly, we find that the association between self-censorship on SNS and the likelihood of publishing political contents on MIMS is stronger for individuals living in former East Germany where, due to historical reasons, large segments of the population are reluctant to talk about politics in public. Our findings suggest that MIMS make a distinctive contribution to contemporary repertoires of political talk, with important implications for the quality and inclusiveness of interpersonal political discussion.

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Alarmed by the oversimplifications related to the ‘fake news’ buzzword, researchers have started to unpack the concept, defining diverse types and forms of misleading news. Most of the existing works in the area consider crucial the intent of the content creator in order to differentiate among different types of problematic information. This article argues for a change of perspective that, by leveraging the conceptual framework of sociocybernetics, shifts from exclusive attention to creators of misleading information to a broader approach that focuses on propagators and, as a result, on the dynamics of the propagation processes. The analytical implications of this perspective are discussed at a micro level (criteria to judge the falsehood of news and to decide to spread it), at a meso level (four possible relations between individual judgements and decisions), and at a macro level (global circulation cascades). The authors apply this theoretical gaze to analyse ‘fake news’ stories that challenge existing models.

We investigate whether and how informal political talk on digital media contributes to citizens' political participation with unique surveys based on samples representative of Internet users in seven Western democracies. We show that political talk on both social networking sites and mobile instant messaging platforms is positively associated with institutional and extra-institutional political participation. However, the relationship between talk on social networking sites and both types of participation is significantly stronger in established democracies (Denmark, France, United Kingdom, and United States) than in "third wave" democracies (Greece, Poland, and Spain). By contrast, the strength of the relationship between political talk on mobile instant messaging platforms and participation is not significantly different when comparing established and more recent democracies. These findings suggest that informal political talk on digital platforms can contribute to citizens' participatory repertoires and that different institutional settings, in combination with different technological affordances, play an important role in shaping these patterns.