The Developmental Diagnostic Dimensional Interview-short version (3Di-sv) provides a brief standardized parental interview for diagnosing autism spectrum disorder (ASD). This study explored its validity, and compatibility with DSM-5 ASD. 3Di-sv classifications showed good sensitivity but low specificity when compared to ADOS-2-confirmed clinical diagnosis. Confirmatory factor analyses found a better fit against a DSM-5 model than a DSM-IV-TR model of ASD. Exploration of the content validity of the 3Di-sv for the DSM-5 revealed some construct underrepresentation, therefore we obtained data from a panel of 3Di-trained clinicians from ASD-specialized centers to recommend items to fill these gaps. Taken together, the 3Di-sv provides a solid basis to create a similar instrument suitable for DSM-5. Concrete recommendations are provided to improve DSM-5 compatibility.

3Di, Assessment, Autism spectrum disorder, DSM-5, Factor analysis, Validity,
Journal of Autism and Developmental Disorders
Department of Child and Adolescent Psychiatry and Psychology

Slappendel, G, Mandy, F, van der Ende, J, Verhulst, F.C, van der Sijde, A, Duvekot, J, … Greaves-Lord, K. (2016). Utility of the 3Di Short Version for the Diagnostic Assessment of Autism Spectrum Disorder and Compatibility with DSM-5. Journal of Autism and Developmental Disorders, 46(5), 1834–1846. doi:10.1007/s10803-016-2713-9