Are Curvy Women More Intelligent?

Could curvier women be more intelligent than their skinnier peers? A new study seems to suggest that this is the case. But there may be more to these findings than meets the eye.

New research suggests a link between waist-to-hip ratio and brain development. But does that mean curvy women are smarter?

(ABC News Photo Illustration)
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The Claim

Researchers at the University of Pittsburgh and the University of California at Santa Barbara looked at data from a study of more than 16,000 women and girls from 1988 to 1994 that detailed their body measurements, as well as their education level and their scores on various cognitive tests.

What they report is that women with waists that were about 70 percent of the diameter of their hips scored slightly better on intelligence tests and tended to have a slightly higher level of education than women with a higher waist-to-hip ratio, or WHR.

The study was published in the journal of Evolution and Human Behavior.

"Controlling for other correlates of cognitive ability, women with lower WHRs and their children have significantly higher cognitive test scores," the study authors note in the article.

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And the study authors also said that men, whether they know it or not, tend to prefer mates with a lower waist-to-hip ratio because of this advantage.

The researchers suggest that the reason for the findings lies in the differences between the fat stored in the hips and legs, and that stored in the belly. The fat surrounding fuller hips and thighs, they said, holds higher levels of omega-3 fatty acids, which foster brain growth.

They go on to say that fat around the waist tends to have higher levels of omega-6 fatty acids, which counter this advantage.

The Problem

But how seriously can we take the idea that the curvier a woman is, the sharper her mind?

The answer: not very. The differences in cognitive ability that the researchers found were small -- on average between 3.6 percent and 7 percent in women with different waist-to-hip ratios, depending on the measure being used.

Because of this, even scientists who call the study intriguing say it would be a mistake to overinterpret the findings to mean that just because a woman has a curvy figure, she's smarter.