Autism Diagnosis Sydney - General Information

Currently the only available assessment process to reliably diagnose Autism Spectrum Disorders is based around two tests. First, a clinical interview to obtain a detailed and relevant developmental history. Second, the administration of a series of structured activities aimed at evaluating presenting symptoms. This process involves the administration of two instruments, 1) the Autism Diagnostic Interview-Revised (ADI-R) and 2) the Autism Diagnostic Observation Schedule (ADOS).

A child's developmental history is an important starting point to evaluate the presence of ASDs. Information gathering involves a detailed clinical interview with the parents or caregivers, using the Autism Diagnostic Interview-Revised (ADI-R). The interview responses are scored with the aid of a specifically designed algorithm consistent with both the ICD-10 and DSM-IV diagnostic criteria.

Children with ASDs present with characteristic symptoms in most circumstances. To evaluate the symptoms and to differentiate them from other disorders (e.g., intellectual disability, genetic disorders) clinicians rely on the Autism Diagnostic Observation Schedule (ADOS). The ADOS is the most widely used psychological test to evaluate communication, social interaction, play and imaginative skills for children and adults suspected of having autism.

When possible, the assessment of ASDs includes an observation of the child in his or her natural environment, such as day care centre, school or home.