How disconfirmatory evidence shapes confidence in decision-making.

ABSTRACT: When assessing our decisions, the normative strategy involves giving equal weight to each evidence sample when computing confidence. However, recent findings suggest that the brain tends to overweight decision-congruent information when forming confidence judgements (i.e., positive-evidence bias; PEB). Here, we re-analyzed nine datasets (total N = 176) from human participants who judged the average color of eight shapes and gave their confidence. This task precisely allowed us to disentangle the impact of choice-confirming and choice-conflicting evidence on the formation of confidence. Strikingly, participants overly relied on evidence that conflicts with their choice, contrary to the normative model and the PEB. To explain this response-incongruent evidence effect in the computation of co

SUBMITTER: Boldt A 

PROVIDER: S-EPMC12571896 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature