Convergent validity of the A-ToM (Adult Theory of Mind) test for individuals with autism spectrum disorder

Brewer, Young, and Barnett reported a comprehensive psychometric evaluation of a new adult theory of mind measure (A-ToM) with a sample of high-functioning autism spectrum disorder (ASD) adults. Although correlations with existing theory of mind (ToM) instruments (i.e., the Strange Stories; the Frith- Happé animations) were reported, relationships with independent putative indicators of ToM development such as social–behavioral and interpersonal proficiencies were not examined. Here, we provide convergent validity data by examining the relations between A-ToM performance, and the social–behavioral skills and interpersonal relationships of ASD adults with IQs exceeding 85. ToM predicted interpersonal relationship quality via the mediating variable, social–behavioral skills, providing evidence of convergent validity for the A-ToM. Alternative models of the relationship between the three variables are described, as are the challenges associated with the interpretation of self-report social and interpersonal functioning measures.