Effect of Cognitive Behavioural Therapy (CBT) for Children With Autistic Spectrum Disorders

Inclusion Criteria: * Assessed to have Autistic Spectrum Disorder, Asperger Syndrome, Pervasive Developmental Disorder, Not Otherwise Specified by the DSM-IV criteria, based on clinical interview, Asperger Syndrome Diagnostic Scale (ASDS) or Autism Diagnostic Observation Schedule (ADOS) * Child have a Verbal Comprehension Index of 80 and Perceptual Reasoning Index of 90 and above * No change of medication dosage 1 month prior to the commencement of program for the child and through out the duration of the study * Written parental consent and assent from children above 12 years old Exclusion Criteria: * Children with Verbal Comprehension Index of 80 and Perceptual Reasoning Index of 90 and below. * Children who are undergoing other Cognitive Behavioural treatment program concurrently * Those without parental consent will not be able to participate