We diagnose by asking about a range of symptoms, how severe they are and how long you have had them. For instance, if all your symptoms started when you were 20 and you never had them before, then whatever it is, it is not autism.
We use certain structured interviews and questionnaires, such as the Ritvo Autism Asperger Diagnostic Scale (the RAADS), which captures symptoms and signs in a range of areas of daily functioning. The scale is thoroughly validated in extensive research studies and in statistical terms it approaches a similar level of diagnostic certainty as one might expect from a blood test for other conditions, as long as it is interpreted by a specialist who is able to appraise the clinically relevant characteristics of the person being assessed.
If you want to seek some further information,call us at 020 3970 0335.