Causal reasoning in social versus non-social domains and its relation to autistic traits

Causation is a fundamental way to make sense of both social and non-social domains. High levels of autistic traits have been linked to enhanced rationality, suggesting a more normative way of reasoning. We aimed to systematically compare causal reasoning tendencies across social and non-social domains and evaluate their relation to self-reported autistic traits and thinking styles. We used a causal reasoning task with three binary (present/absent) variables forming common cause networks (X←Z→Y) representing social and non-social domains. Causal mechanisms in the social domain represented social relationships, while causal mechanisms in the non-social domain represented economics and meteorology. We recruited 76 participants from the general population and measured their levels of autistic traits and thinking styles on self-reports. We found that participants consistently violated the normative rules of causal reasoning. We also identified systematic differences across domains. However, we did not identify meaningful differences between clusters of reasoners in their levels of self-reported autistic traits and thinking styles. We conclude with that people violate the normative rules of causal reasoning differently across domains. However, we cannot conclude that this relates to levels of autistic traits or thinking styles.