http://www.sciencedaily.com/releases/2012/09/120905135340.htm
ScienceDaily (Sep. 5, 2012) — Men and women clearly have different strategies for picking sexual partners, but the reason why differences exist is less clear. The classic explanation for these differences has been that men's and women's brains have evolved to make certain choices, but a new study in Psychological Science, a publication of the Association for Psychological Science, suggests that evolution is only part of the answer.
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But in the modern world, 'success' is not necessarily tied to offspring, so researchers Marcel Zentner and Klaudia Mitura of the University of York in the UK hypothesized that the influence of evolutionary biases on mate choice would decline proportionally with nations' gender parity, or the equality between men and women.
"There was accumulating evidence that gender differences in mental abilities, such as math performance, vanish in gender-equal societies," said Zentner. But he and his fellow researchers wanted to see if they could observe the same trend for selecting sexual partners.
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They found that the gender difference in mate preferences predicted by evolutionary psychology models "is highest in gender-unequal societies, and smallest in the most gender-equal societies," according to Zentner.
These results were confirmed in a second study based on mate preferences reported by 8,953 volunteers from 31 nations. Again, Zentner and Mitura found that there were fewer differences between men and women's preferences in more gender-equal nations compared to less gender-equal nations.
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"Indeed, the capacity to change behaviors and attitudes relatively quickly in response to societal changes may itself be driven by an evolutionary program that rewards flexibility over rigidity."
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