Overview

The Developmental, Diagnostic and Dimensional Interview (3di) is an innovative computerised assessment for autism spectrum disorder and other psychiatric disorders of childhood. The 3di includes the following features:

• a dimensional assessment of the severity of features associated with a diagnosis of autism

• the ability to generate diagnoses of more than 20 childhood psychiatric disorders using ICD-10 or DSM‑5 criteria – so allowing the assessment of comorbidity in relation to autism

• automatic production of comprehensive reports detailing information collected in the interview; the major reports are suitable for parents and referrers with limited editing

• high reliability

• high agreement with the ADI-R’s ASD algorithm