First the link to this week’s complete list as HTML and as PDF.
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The first reports on oxytocin a few years ago led some to ideas, that a small addition to our drinking water or similar might solve all our social ills. As Samuni et al. demonstrate, the hormone and its Janus-faced counterside have been part of primate evolution for quite some time.
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For a measurement to be diagnostic it does not suffice if the means of two assemblages are significantly different. Men and women have to compete in separate contests in sports, yet outside of the small elite of world champions the times or heights attained by participants can’t predict their sex better than chance. Looking at the scatter beneath their very weak regression, Wallace et al.’s result falls into the same category.