Abstract
While irrational beliefs cluster together, their content differs widely, from beliefs about collective memories shaping biological properties (pseudoscientific) to those about premonition (extrasensory). This difference might extend further—they might reflect a similar information processing style but be differently embedded in worldviews; for example, pseudoscientific beliefs are typically endorsed by conservatives. Across three studies (two preregistered) in two post-conflict countries (total N = 1042), followed by an internal meta-analysis, we investigated whether pseudoscientific and extrasensory perception beliefs (1) are related to a less analytical but more intuitive thinking style, prone to contradictions and fatalistic thinking, but (2) are differentially linked to a conservative, authoritarian and ethnocentric worldview, and (3) are differentially related to past use of non-evidence-based practices, extrasensory perception experiences and civic activism. As expected, both beliefs were similarly predicted by information processing style. However, they were also similarly predicted by authoritarian and, to a lesser extent, ethnocentric views. Moreover, both beliefs were tied to similar behavioural patterns. We argue that the relationship among a conservative worldview, irrational beliefs and socially relevant behaviours is important for understanding how public policies get politicized.