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If you have symptoms in these areas, and those symptoms seriously impact your daily activities, you’ll probably be diagnosed as “on the spectrum.”But the autism spectrum is incredibly wide and varied. Some people are brilliant while others are intellectually disabled. Some have severe communication problems while others are public speakers.
there is only one diagnostic category for people with autism: autism spectrum disorder. Anyone with symptoms consistent with autism will receive an ASD diagnosis -- along with a functional level (1, 2, or 3) and, if appropriate, specifiers
Level 3
For example, a person with few words of intelligible speech who rarely initiates interaction and, when he or she does, makes unusual approaches to meet needs only and responds to only very direct social approaches.Inflexibility of behavior, extreme difficulty coping with change, or other restricted/repetitive behaviors markedly interfere with functioning in all spheres
Level 2
For example, a person who speaks in simple sentences, whose interaction is limited to narrow special interests, and who has markedly odd nonverbal communication.Inflexibility of behavior, difficulty coping with change, or other restricted/repetitive behaviors appear frequently enough to be obvious to the casual observer and interfere with functioning in a variety of contexts. Distress and/or difficulty changing focus or action
Level 1
For example, a person who is able to speak in full sentences and engages in communication but whose to-and-fro conversation with others fails, and whose attempts to make friends are odd and typically unsuccessful.Inflexibility of behavior causes significant interference with functioning in one or more contexts. Difficulty switching between activities. Problems of organization and planning hamper independence.