All About Diagnosis

About Autism - Diagnosis

How is ASD Diagnosed?

ASD is diagnosed through an assessment which includes observing and meeting with the individual, their family and service providers. Information is gathered regarding the individual’s strengths and difficulties, particularly in the areas of social interaction and communication as well as restricted and repetitive interests, activities and behaviours.

Such information may be obtained by administering standardised tests or questionnaires. ASD is usually diagnosed in early childhood, but assessments can be undertaken at any age. There is no single behaviour that indicates ASD. There are no blood tests that can detect ASD.

Developmental paediatricians, psychiatrists and psychologists with experience in assessing individuals with ASD are qualified to make a diagnosis. When making a diagnosis, the clinician will usually first determine whether an individual meets the criteria for autistic disorder. If all the criteria are not met, they may consider Asperger’s disorder, or PDD-NOS (atypical autism).