Overcoming ideology-consistent biases: does it help to make things easier?

Philip U. Gustafsson, Torun Lindholm, Freja Isohanni, Ola Svenson and Sophia Appelbom

Judgment and Decision Making, 2025, vol. 20, -

Abstract: In 2 experiments, we attempted to reduce belief-consistent biases in interpretations of a polarized problem by making information easier to interpret. In the experiments, participants solved numerical problems that were either framed in a politically polarized (the effects of Muslim prayer rooms on support for Islamic extremism) or a neutral setting (the effects of a skin cream on skin rash). In both studies, the problems were presented twice, with the second presentation accompanied with an aid to facilitate problem-solving. In Experiment 1, this aid came in the form of an informative text on how to calculate the numbers to solve the problem. In Experiment 2, the aid provided participants with the first calculus necessary to solve the problem: transforming frequencies to percentages. Overall, results demonstrated belief-consistent responses in the polarized scenario when participants attempted to solve the first problem (higher accuracy when the correct conclusion was in line with participants’ ideology). Information on how to calculate the problem (Experiment 1) only slightly reduced the biased responses, whereas the added percentages (Experiment 2) led to a substantial reduction of the bias. Thus, we demonstrate that the facilitation of complex information on a polarized topic reduces biases in favor of rational reasoning.

Date: 2025
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