It is very important that the child has a comprehensive evaluation to find out the cause of the intellectual disability, and strengths and specific needs to support gaining new skills. Many professionals are involved in the evaluation. General medical tests as well as tests in areas such as neurology (the nervous system), psychology, psychiatry, special education, hearing, speech and vision, and physical therapy are part of the evaluation. A clinician, often a pediatrician or a child and adolescent psychiatrist, coordinates these tests.