Beyond Content: Psychological Structure of Ideological Beliefs.

Research on ideological beliefs structure primarily focused on mapping the underlying dimensions of belief content. Beyond what beliefs people hold, it is also crucial to understand how they hold these beliefs. Drawing from diverse literature, we identified nearly 20 constructs and hypothesized three overarching factors of the psychological structure of ideology: importance, certainty, and metacognitive difficulty. Using 49 political issues across the United States, Poland, and India (Ntotal = 2,838), we found evidence for two primary dimensions: importance and metacognitive difficulty. Certainty did not emerge as a separate factor: in the United States, certainty items split between these two dimensions, whereas in Poland and India, importance and certainty converged. We also investigated the predictive power of these dimensions. Higher importance and certainty and lower metacognitive difficulty were linked to more extreme beliefs, and importance was a key predictor of advocacy intentions. These findings offer a comprehensive framework for understanding how ideological beliefs are held.