Simon Baron Cohen over at the New York times explains clearly the current state of research on male and female brains, autism, the ability to systematize and do well in Maths and Science. You can ignore the second paragraph, where he disagrees with something Larry Summers never said. But the remaining parts are interesting. I am excerpting a lot because the article might go behind a paywall sometime.

In women, meanwhile, the connective tissue that allows communication between the two hemispheres of the brain tends to be thicker, perhaps facilitating interchange. This may explain why one study from Yale found that when performing language tasks, women are likely to activate both hemispheres, whereas males (on average) activate only the left hemisphere.

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On average, males finish faster and score higher than females on a test that requires the taker to visualize an object’s appearance after it is rotated in three dimensions. The same is true for map-reading tests, and for embedded-figures tests, which ask subjects to find a component shape hidden within a larger design. Males are over-represented in the top percentiles on college-level math tests and tend to score higher on mechanics tests than females do. Females, on the other hand, average higher scores than males on tests of emotion recognition, social sensitivity and language ability.

Many of these sex differences are seen in adults, which might lead to the conclusion that all they reflect are differences in socialization and experience. But some differences are also seen extremely early in development, which may suggest that biology also plays a role. For example, girls tend to talk earlier than boys, and in the second year of life their vocabularies grow at a faster rate. One-year-old girls also make more eye contact than boys of their age.

In my work I have summarized these differences by saying that males on average have a stronger drive to systemize, and females to empathize. Systemizing involves identifying the laws that govern how a system works. Once you know the laws, you can control the system or predict its behavior. Empathizing, on the other hand, involves recognizing what another person may be feeling or thinking, and responding to those feelings with an appropriate emotion of one’s own.

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What of Mr. Summers’s other claim, that such sex differences are innate? We know that culture plays a role in the divergence of the sexes, but so does biology. For example, on the first day of life, male and female newborns pay attention to different things. On average, at 24 hours old, more male infants will look at a mechanical mobile suspended above them, whereas more female infants will look at a human face. [Emphasis mine]

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What does all this have to do with autism? According to what I have called the “extreme male brain” theory of autism, people with autism simply match an extreme of the male profile, with a particularly intense drive to systemize and an unusually low drive to empathize.

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It helps explain the social disability in autism, because empathy difficulties make it harder to make and maintain relationships with others. It also explains the “islets of ability” that people with autism display in subjects like math or music or drawing – all skills that benefit from systemizing.

I just thought that Prof. “Congenital Idiot” Abinandanan might find these things interesting.

(Link via Instapundit)