People selectively exhibit the bias, especially in those situations where it favors their current worldview as revealed by their political orientation: The same information was presented to all participants, but people developed the causal illusion bias selectively

Causal illusions in the service of political attitudes in Spain and the UK. Fernando Blanco, Braulio Gómez-Fortes and Helena Matute- Front. Psychol. | doi: 10.3389/fpsyg.2018.01033

Abstract: The causal illusion is a cognitive bias that results in the perception of causality where there is no supporting evidence. We show that people selectively exhibit the bias, especially in those situations where it favors their current worldview as revealed by their political orientation. In our two experiments (one conducted in Spain and one conducted in the UK), participants who self-positioned themselves on the ideological left formed the illusion that a left-wing ruling party was more successful in improving city indicators than a right-wing party, while participants on the ideological right showed the opposite pattern. In sum, despite the fact that the same information was presented to all participants, people developed the causal illusion bias selectively, providing very different interpretations that aligned with their previous attitudes. This result occurs in situations where participants inspect the relationship between the government’s actions and positive outcomes (improving city indicators), but not when the outcomes are negative (worsening city indicators).

Keywords: cognitive bias, causal illusion, Ideology, Motivated reasoning, causality