All autistic individuals possess special skills and genius abilities (e.g., able to memorize license plates, complete complicated mental math, exceptional musical / art skills)
Although the autistic individual depicted in the movie "Rainman" possessed special abilities, the vast majority of autistic people do not. Autistic individuals who possess "genius" abilities are often called "savants" or "autistic savants". Approximately 50 percent of all savants have autism, while only about five-to-ten percent of autistic individuals possess extraordinary savant skills. However, most autistic individuals display uneven or scattered skill development (e.g., do better on nonverbal tasks, motor tasks and concrete tasks). Additionally, most autistic individuals display significant cognitive / intellectual impairments.
All autistic individuals are withdrawn, avoid eye contact, engage in self injurious behaviour, rock, spin objects and avoid affection.
Individuals with autism tend to be diverse. Therefore, it is difficult to use words such as "all" or "none" when describing this group. Some autistic individuals engage in eye contact while others enjoy tickles and hugs. However, not all engage in rocking, spinning or self abusive behaviour.
Individuals with autism share common behavioural characteristics, and it is on this basis that a diagnosis is made.
Specifically, autistic individuals display the following: