“You wouldn’t celebrate September 11”: Testing online polarisation between opposing ideological camps on YouTube

Ana-Maria Bliuc, Laura G. E. Smith, Tina Moynihan

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
220 Downloads (Pure)


Online communication is increasingly associated with growing polarisation in society. In this research, we test a dual-pathway model of online polarisation via intergroup and intragroup interaction of supporters of opposing ideological camps on YouTube. The interaction occurs over a video parody promoting a campaign to change the date of Australia Day celebrations, a divisive issue entailing contrasting narratives about Australian identity, meanings of Australia Day, and interpretations of colonial history. To capture ideological polarisation, we conducted computerised linguistic analysis of polarised talk in the form of comments and replies (N = 1,027) from supporters and opponents of the campaign. The indicators used to capture polarisation are social identification, position certainty, and psychological distance (as reflected by increased anxiety and hostility). Our results show that most polarisation (in the form of increased hostility) occurs in conditions of expression of outgroup dissent (the intergroup interaction pathway) and the most debated content on the online forum revolves around themes relevant to group identity. In addition to contributing to the understanding of group process in an online context, another key contribution of this research is providing a theory-driven method and blueprint to detect polarisation in social media data.

Original languageEnglish
Pages (from-to)827-844
Number of pages18
JournalGroup Processes and Intergroup Relations
Issue number6
Early online date30 Sept 2020
Publication statusPublished - Sept 2020


  • computerised linguistic analysis
  • ideological polarisation
  • online interaction
  • social identity

ASJC Scopus subject areas

  • Cultural Studies
  • Communication
  • Social Psychology
  • Arts and Humanities (miscellaneous)
  • Sociology and Political Science


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