Theory of mind in naturalistic conversations between autistic and typically developing children and adolescents
Successful social interactions are assumed to depend on theory of mind (ToM)—the ability to represent others’ mental states—yet most studies of the relation between ToM and social-interactive success rely on non-interactive tasks that do not adequately capture the spontaneous engagement of ToM, a crucial component of everyday social interactions. We addressed this gap by establishing a novel observational rating scale to measure the spontaneous use of ToM (or lack thereof) within naturalistic conversations (conversational ToM, or cToM). In 50 age- and gender-matched dyads of autistic and typically developing children aged 8–16, we assessed cToM during 5-minute, unstructured conversations. We found that ratings on the cToM Negative scale, reflecting ToM-related violations of conversational norms, were negatively associated with two forms of non-interactive ToM: visual-affective and spontaneous. In contrast, the cToM Positive scale, reflecting explicit mental state language and perspective-taking, was not associated with these non-interactive ToM abilities. Furthermore, autistic participants were rated higher than typically developing participants on cToM Negative, but the two groups were rated similarly on cToM Positive. Together, these findings provide insight into multiple aspects of ToM in conversation and reveal a nuanced picture of the relative strengths and difficulties among autistic individuals.