Informational and Normative Influence on Conformity in Autism.

This preregistered study examined whether adults with autism spectrum disorder (ASD) show reduced social conformity and whether any such reduction depends on the type of social influence. Social conformity-the tendency to adjust one's judgments to align with those of others-is typically driven by normative (acceptance-seeking) and informational (accuracy-seeking) motives. Thirty adults with ASD and 30 matched neurotypical (NT) adults completed two tasks: a preference rating task indexing normative influence, and a dot-counting task indexing informational influence with monetary rewards. Contrary to our predictions, adults with ASD conformed as much as NT adults in the preference rating task but showed significantly reduced conformity in the dot-counting task. Exploratory analyses indicated that this reduction was driven by a distinct subgroup of nine adults with ASD who never revised their initial estimates despite informative social cues, resulting in poorer accuracy and lower rewards. When this subgroup was excluded, group differences in conformity were no longer evident. These findings suggest that, overall, adults with ASD are as susceptible as NT adults to normative influence but less responsive to informational influence, highlighting the importance of distinguishing between types of social influence and considering individual differences when characterizing social behavior in ASD.