Autism has been defined as a developmental impairment that evolves from a neurological disorder that influences the normal functioning of the brain. It is featured by the unusual development of social skills, communication skills and logical reasoning. The impact on males is more i.e four times than that of the females. (What is Autism) It was until the year 1943 that there was no name for a disorder that presently affects about one of every five hundred children. Dr. Leo Kanner of the Johns Hopkins Hospital, during the year, analyzed a group of 11 children and adopted the concept of early infantile autism. Simultaneously, a German scientist, Dr. Hans Asperger, narrated about somewhat a milder form of the disorder that became recognized as Asperger Syndrome. These two types of disorders presently finds place among the five pervasive developmental disorders -- PDD in the Diagnostic and Statistical Manual of Mental Disorders DSM-IV-TR and more popular now-a-days as the Autism Spectrum Disorders. (Autism Spectrum Disorders (Pervasive Developmental Disorders)).

             All such disabilities are differentiated by the changing magnitude of the impairment in social interactions, communication skills, confined, repetitive and stereotyped levels of behavior. The autism spectrum disorders are identified by the age of 3 and also in some cases as early as 18 months. Studies recommend that many children may be correctly detected by the age of 1 year or lesser. The existence of any of the warning symptoms of ASD provides sufficient impetus to get the child assessed by a professional specializing in such disorders. The unusual behaviors in the child are first detected by the parents. The first signs of an ASD can also exist in children who appear to have been developing normally. While an engaging, babbing toddler instantly becomes withdrawn, silent, being indifferent to social overtures is self-abusive, and then something is considered to be wrong.