The Post-Truth Divide: How Media Shapes Voting in Türkiye’s Political Duopoly

This paper examines the voting influence of post-truth, quantified through a novel measure that combines epistemic error and false confidence. By employing data collected from 2,163 Turkish participants in the World Values Survey, the post-truth phenomenon does not have a direct influence on the duopolies. Instead, this phenomenon increases support for the ruling JDP by 5.8% through social media, while exposure to or use of news decreases support for the main opposition RPP by 4.5%. These results suggest that post-truth impacts are context-dependent and that social media use and news exposure may reinforce people's voting behaviour in Türkiye.