The Autism Diagnostic Observation Schedule Second Edition (ADOS-2) is a semi-structured, standardised assessment of communication, social interaction, and play. It provides a series of standardised contexts in which the individual's social communication, and repetitive, stereotyped behaviours can be observed. It has been designed to assist in the diagnosis of autism spectrum disorder and is a complementary instrument to the Autism Diagnostic Interview Revised (ADI-R). Standardised toys and activities are used to present opportunities for social and communicative interaction with the examiner. A diagnostic algorithm consistent with DSM-V and ICD-10 clinical diagnoses is generated.
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