vivinator wrote:
i think I've seen it asked if it's more predominant amongst Jews
I think there was a research study that was looking into genetics. I think it was Ashkenazi jews. I think it was because they had a tradition of marrying people within their own communities, so it was easier to try to find the genetic anomalies, in much the same way as the population of Iceland has been subject of kinds of genetic research, because they're also a comparatively isolated, inter-marrying population.
If you try to compare, say, african american, with Icelandic, with Ashkenazi jewish, with Samoan, with Chinese, with Nigerian or whatever, there would automatically be a heck of a lot of genetic differences, relating to colour of skin and hair colour and texture, and eye colour and so on, which would make it more difficult to track down the differences that are significant markers for Asperger's or autism generally. When you compare a like with like population, you're not going to get so many differences, because, hair, eye, skin colour etc will be similar, so the main differences you're going to get flagged up are genetic anomalies and diseases, I guess.