Mechanism underlying asymmetric certainty effects

Identify the mechanism responsible for the asymmetric effect whereby certainty expressed by like-minded others is associated with less weakening, whereas certainty expressed by opposing others has no clear independent association when controversy is also visible.

Background

When certainty was presented alone, in-group certainty was associated with less weakening and more strengthening, while out-group certainty showed the reverse pattern. When controversy and certainty were presented together, only the association between in-group certainty and reduced weakening remained clear.

The authors explored participants’ optional written explanations, but these retrospective and self-selected reports could not distinguish among selective attention, conformity, resistance, biased assimilation, and other possible processes. They therefore leave the causal mechanism unresolved and suggest direct measures of attention and information processing, experimental manipulation of candidate mechanisms, and reasoning elicitation before and after exposure.

References

First, the mechanism behind the asymmetric pattern remains unresolved.

— Controversy and Group Certainty Jointly Shape Everyday Moral Judgments  (2609.04750 - Chen et al., 4 Sep 2026) in Discussion, paragraph beginning “Three limitations also point to future research questions.”

Finally, our outcomes capture the direction of judgment revision, not whether that revision improved the judgment.

— Controversy and Group Certainty Jointly Shape Everyday Moral Judgments  (2609.04750 - Chen et al., 4 Sep 2026) in Discussion, paragraph beginning “Finally, our outcomes capture the direction...”