Interesting classification methodology, but not sure I'd agree. For one, many people with AS have some of the same sensory issues presented in "classic" or "Kanner's autism". Also, the distinction between ADD and ADHD is probably inaccurate. Many kids with AD/HD can be both inattentive and hyperactive. It sounds like what is being described as ADD is closer to Oppositional Defiant Disorder. Both are behavior disorders, but ODD is less about distractibility and more about resisting authority. I would also hesitate to agree that a person "gets the illness" at these ages--if it really is neurological, then a child would develop the disorders when the brain is wiring itself in utero. Maybe certain symptoms don't manifest until later, but the disease is there from the get-go.
I like thinking about the issue of autonomy in relation to ODD (or what the author perceives as ADD). It's an interesting approach and one that educators (like myself) might think more strongly about using.
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"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind."