On the environment tend to require fixed or abnormal reaction to normal everyday life changes declined,and some children every day to eat the same meal or dish,several years,every fixed defecation time,place or toilet,leaving out a certain route,if this move is restless,noisy or refuse.
Stereotyped,repetitive behaviors and special action pacing back and forth,performance self rotation,circling away,repeated jumping,the most common posture is at hand placed on the chest,this action is often occurred in the age of 2,along with the age growth and disappeared.And beat,shake,strike,strike,rotating movements.Also has the destructive behavior and self injurious behaviors,such as biting,head to boxing,wall and so on,these behaviors occur often in children with nothing to do,sometimes they are frequently appear excited,agitated when the.Fixed mode allowed others to change things for the children with autism,a common phenomenon.