Autism Assessment Service

We offer a diagnostic assessment package for adolescents and adults.

Prior to the appointment, you will be asked to complete screening questionnaires that we will send you in the post. This helps us to obtain an initial profile of the child or adult before the diagnostic assessment takes place.

The main part of the assessment usually takes place in Whitstable, Kent and takes approximately 4 hours. It typically includes a direct behavioural observation and a detailed face to face interview.

The diagnostic assessment will rely primarily on two measures generally considered to be the ‘gold standard’ for ASD diagnostic, both of which have been evaluated positively by NICE.


  • The Autism Diagnostic Interview – Revised (ADI-R)

  • The Autism Diagnostic and Observation Schedule – 2nd Edition (AD05-2)

The face to face interview takes up to 3 hours and is usually carried out with one or both parents, or where relevant it can be with someone else who is familiar with the child or adults history and current circumstances. The child does not need to attend the interview, but must be present for the direct behavioural observation. The observation of the child or adult takes about one hour. 

Within 2-3 weeks of the assessment being completed, Robb Psychology Kent will provide a detailed report on the diagnosis, a summary of the developmental history, a detailed description of their current presentation in each of the main ASD areas, together with post diagnostic advice such as resources, signposting to relevant local support services and recommendations for support.


An initial diagnostic assessment will typically cost around £1700.

Please call 01227 656554 or email to arrange a free initial telephone consultation.