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

• allows an assessment for autism in as little as 45 minutes

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

• excellent reliability and validity; criterion validity established in relation to the ADI-R for the ICD-10 ASD assessment

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