Autism falls on a spectrum. That means that no two causes are exactly alike. Sometimes this can make it very hard to diagnosis. The following video is a look inside the behaviors of a child with autism that is living in middle class home.
You will see that this child has various Obsessive Compulsive tendencies. In the video, this is demonstrated, with her need to leave certain things certain ways. One thing is her need to leave the door to the fireplace open. Another example of this obsessive compulsive disorder that is playing into the child’s autism is her need to keep the lights off. Notice that she is approximately 6 years old and is also non-verbal.