Originally Posted by Bostonian
Male and female brains are different, as explained in the following article.

http://www.webmd.com/balance/features/how-male-female-brains-differ
How Male and Female Brains Differ
Researchers reveal sex differences in the brain's form and function.

Here is the paper that I think the WebMD article is based on.

http://www.sciencedirect.com/science/article/pii/S0160289611001206
Intelligence
Volume 40, Issue 1, January–February 2012, Pages 60-68
Sex differences in brain volume are related to specific skills, not to
general intelligence
Miguel Burgaleta, Kevin Head, Juan �lvarez-Linera, Kenia Mart�nez,
Sergio Escorial, Richard Haier, Roberto Colom
Received 26 April 2011; revised 27 October 2011; Accepted 27 October
2011. Available online 29 November 2011.
Abstract
It has been proposed that males would show higher mean scores than
females in general intelligence (g) because (1) men have, on average,
larger brains than women, and (2) brain volume correlates with g. Here
we report a failure to support the conclusion derived from these
premises. High resolution MRIs were acquired in a sample of one
hundred healthy young participants for estimating total, gray, and
white matter volumes. Participants also completed an intelligence
battery – comprising tests measuring abstract, verbal, and spatial
abilities – that allowed the extraction of g scores. Results showed
consistent relations between sex differences in brain volumes and
non-g spatial and verbal skills but not for g.

Charles Murray's comments are at http://blog.american.com/2011/12/a-...nding-male-female-cognitive-differences/

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