According to the guidelines set out by the National Institute for Clinical Excellence (NICE) an assessment for ASD should involve a range of clinicians from different professional disciplines e.g. Clinical Psychology, Speech and Language Therapy and Occupational Therapy. Testing & assessments should include observations of the child in different contexts (e.g. school, home and clinic) and should gather information across the child’s life (e.g. historical and current). The team then meet and develop a “clinical formulation” which is simply a shared understanding of the individuals strengths and needs. This then may lead to a clinical diagnosis being made.