What is Autism and What Are Some of the Behaviour Characteristics of Autism?
According to Wikipedia, it is a brain development disorder that impairs social interaction and communication and causes restricted and repetitive behaviour, all starting before a child is three years old. Another definition states that it is a neurodevelopmental disability, which in normal language is a condition that affects the normal growth of the brain so that the individual has difficulty with day-to-day living. Autism is one of the five pervasive developmental disorders (PDD), which are characterized by widespread abnormalities of social interactions and communication, and severely restricted interests and highly repetitive behaviour.