Autism is a childhood disorder that usually occurs more often in boys than in girls.

The skills of an autistic child can be high or low level depending on both the IQ and the verbal communication skills.

What are the causes of autism?

The causes of autism are still unknown. But there are some theories:

1. The autistic child's relationships and their environment and social environment. It is said that autism is because it has not received affection as a child. That has had distant fathers, cold, too intellectual.
2. Cognitive deficiencies and abnormalities. There seems to be a neurological basis although not proven.
3. Certain basic biochemical processes. It has been found excessive secretion of serotonin in platelets of autistic people.