In this Sunday's Washington Post, I reviewed Hannah Holmes's book The Well-Dressed Ape. Overall it was a pretty positive review, but I criticized her for the way she linked testosterone (via left-handedness and ring-finger length) with various traits, including violence, autism, homosexuality, etc (see review for details). So I was very interested to see this great post on Neuroskeptic today about the problems with coverage of testosterone (pictured left) and autism. Check it out.
As I understand it; autism is not caused by high testosterone, high testosterone is caused by autism.
It could be either - at the moment there's no way of knowing.