| − | Autism is a mental disorder characterized by inability to interact socially, linguistic disability, intense, narrow interests, and repetitive behaviors. It is usually detected by the time a child is four years old but some people have forms of autism that are so mild that they go unnoticed into adulthood. | + | '''Autism''' is a mental disorder characterized by inability to interact socially, linguistic disability, intense, narrow interests, and repetitive behaviors. It is usually detected by the time a child is four years old but some people have forms of autism that are so mild that they go unnoticed into adulthood. |