Jeremy Ackerman-Yost
Explorer
Bumbles, I'm sorry if I offended you. I find all of this hysterical for a variety of reasons, and it probably makes me a tad insensitive.
I'll stay away from further commentary on that specific issue.
However, I can't really let this go by from your other post:
For one thing, testosterone doesn't cross the blood-brain barrier as testosterone. It is converted into estrogen at crossing, so you literally can't have opposite effects on brain structures with prenatal testosterone that is fetus-sourced. Any (highly debatable) male-female brain differences have to be secondary to other changes. Furthermore, their study has no data on mother-sourced hormones for the children they tested, so it's one inference piled on top of another, plus those inferences are about step 1 and step 7 with no information on steps 2, 3, 4, 5, and 6.
Additionally, effects of this type even when they do work out usually account for something like 1-2% of the variance, which is effectively zilch. That's less than the change in test scores that results from having a mild stomach upset the day of the test.
I would take that with at least a grain of salt. Maybe even a big ol' salt lick.
I'll stay away from further commentary on that specific issue.
However, I can't really let this go by from your other post:
Prenatal environment and hormonal effects was actually my field for a few years, and I can tell you that's a pretty impressive load of tripe. I'm trying to track down the primary sources on it and keep coming up with nothing but contradictions.There's a bit here:
Half Sigma: Biological basis for sex differences in math ability
I'm sure there's lots of other studies you can find.
For one thing, testosterone doesn't cross the blood-brain barrier as testosterone. It is converted into estrogen at crossing, so you literally can't have opposite effects on brain structures with prenatal testosterone that is fetus-sourced. Any (highly debatable) male-female brain differences have to be secondary to other changes. Furthermore, their study has no data on mother-sourced hormones for the children they tested, so it's one inference piled on top of another, plus those inferences are about step 1 and step 7 with no information on steps 2, 3, 4, 5, and 6.
Additionally, effects of this type even when they do work out usually account for something like 1-2% of the variance, which is effectively zilch. That's less than the change in test scores that results from having a mild stomach upset the day of the test.
I would take that with at least a grain of salt. Maybe even a big ol' salt lick.