I think that if I could do any sort of research of autism that I wanted to do, at this point I would take a sample of classic, early infantile autism persons and compare them with what I call "classic late onset autism", individuals. I think we will find that the cause of those youngsters with autism who have autism from birth is probably different than those who have late onset autism.

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.

With respect to why some acquired savants are musical, and some are good at the arts, and some are mathematical, why aren't they all the same; I think that has to do with this genetic endowment that all of us have.

I think one of the problems with the definition of autism is we keep expanding it. It started as "early infantile autism", and then it became "autism", and now it's "autism spectrum disorder". I'm not opposed to that from the standpoint of trying to broaden our vistas, and so forth. But from a research point of view, the term autism is lost in specificity.

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.

What happens is most of us are so busy in our lives with our families and our vocation which we should be, but we tend not to look at what I call these parallel interests, and they develop along the way. And sometimes one can say, well, you know, why should I grow my own garden and spend all that time when I can buy carrots cheaper at the supermarket and just put aside that kind of an interest.

The ways in which acquired savants show up are usually the same ways that congenital, or non-acquired, savant syndrome shows up. They tend to show up in the same areas: music, art, math, visual, spatial skills, and calendar calculating, although calendar calculating probably isn't quite as prominent in that group. They tend to show up quite quickly, or sort of explode on the scene and they then tend to have an obsessive sort of forceful quality about them in the same way as savant skills. So they tend to show up in the same ways.