We can't use the word normal anymore because it's sort of come to be politically incorrect, because normal implies a classification, and categorizations, and exclusions, and so forth. So neurotypical is the word that we now have to use for what I call normal behavior. Neurotypical behaviors are those kinds of behaviors within the range of usual human conduct that do not rise to the level of a disorder.

Parents don't particularly care whether it's early infantile autism or whatever label the clinicians have put on it. All they want is treatment, and they want what's best for their child, whatever that is. And when it comes to treatment, it may be that there's much more shared interventions that don't make any difference what label we're putting on it.

We have to be careful that we don't keep multiplying disorders and diluting them. I think there is a difference. People talk about Asperger's as high-functioning autism, which I think it is. But it does have some of its own characteristics, like the preservation of language, particularly, which may be right brain dysfunction instead of left brain dysfunction, and we lose something in that, as things lose their specificity, and we keep diluting things. I'm not sure that's helpful.

We have medicalized a lot of things that I think are not really medical conditions.

A savant, by definition, is somebody who has a disability and, along with that disability, has some remarkable ability. Prodigies and geniuses have the remarkable abilities that the savant shows, but they do not have a disability. So, by definition, a savant includes someone with a disability, and a prodigy or genius are people who have these remarkable skills but they do not have a disability.

There are people at the extremes who aren't able to do anything musically, and then others sort of fall in the middle. And the same thing with math, and the same thing with art. You'll find people who are geniuses, or prodigies at the far end of the bell shaped curve, and I think you will find some of the acquired savants in that category who happened to have been endowed with that kind of talent, which explains why not everyone becomes an acquired savant.

The narrower we define autism, and the more strictly we control for particular behaviors, the more likely we are to find what I think are the subgroups of autism.