Boys and Testosterone, continued

[lalicopa]

So, I've been doing research on this testosterone theory, because this is not the first I heard of it. Turns out that there's really only ONE guy who touts this theory, and he's a psychologist. His name is Steve Biddulf. I can't seem to find *any* scientific data or medical information about this surge in preschool boys. I'm pretty good at finding stuff online. Anyone have any other information, other than an Amazon review of this guy's books? I would love to be able to explain his behavior with hormones, god knows I've done it for myself many times over the years!