Partisan sharing: Facebook evidence and societal consequences

Jisun An, Daniele Quercia, Jon Crowcroft

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Citations (Scopus)


The hypothesis of selective exposure assumes that people seek out information that supports their views and eschew information that conflicts with their beliefs, and that has negative consequences on our society. Few researchers have recently found counter evidence of selective exposure in social media: users are exposed to politically diverse articles. No work has looked at what happens after exposure, particularly how individuals react to such exposure, though. Users might well be exposed to diverse articles but share only the partisan ones. To test this, we study partisan sharing on Facebook: the tendency for users to predominantly share like-minded news articles and avoid conflicting ones. We verified four main hypotheses. That is, whether partisan sharing: 1) exists at all; 2) changes across individuals (e.g., depending on their interest in politics); 3) changes over time (e.g., around elections); and 4) changes depending on perceived importance of topics. We indeed find strong evidence for partisan sharing. To test whether it has any consequence in the real world, we built a web application for BBC viewers of a popular political program, resulting in a controlled experiment involving more than 70 individuals. Based on what they share and on survey data, we find that partisan sharing has negative consequences: distorted perception of reality. However, we do also find positive aspects of partisan sharing: it is associated with people who are more knowledgeable about politics and engage more with it as they are more likely to vote in the general elections.

Original languageEnglish
Title of host publicationCOSN 2014 - Proceedings of the 2014 ACM Conference on Online Social Networks
PublisherAssociation for Computing Machinery, Inc
Number of pages11
ISBN (Print)9781450331982
Publication statusPublished - 1 Oct 2014
Event2nd ACM Conference on Online Social Networks, COSN 2014 - Dublin
Duration: 1 Oct 20142 Oct 2014


Other2nd ACM Conference on Online Social Networks, COSN 2014


  • Facebook
  • News aggregators
  • Online social network
  • Partisan sharing
  • Politics
  • Selective exposure
  • Social media
  • Twitter

ASJC Scopus subject areas

  • Computer Networks and Communications

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  • Cite this

    An, J., Quercia, D., & Crowcroft, J. (2014). Partisan sharing: Facebook evidence and societal consequences. In COSN 2014 - Proceedings of the 2014 ACM Conference on Online Social Networks (pp. 13-23). Association for Computing Machinery, Inc.