Paul Graham Isn't Keeping Women out of Tech(thedatingring.tumblr.com)

  Men and women display patterns of behavioral and cognitive 
  differences that reflect varying hormonal influences on 
  brain development

  By Doreen Kimura (May 13, 2002)

  Men and women differ not only in their physical attributes 
  and reproductive function but also in many other 
  characteristics, including the way they solve intellectual 
  problems. For the past few decades, it has been 
  ideologically fashionable to insist that these behavioral 
  differences are minimal and are the consequence of 
  variations in experience during development before and 
  after adolescence. Evidence accumulated more recently, 
  however, suggests that the effects of sex hormones on brain 
  organization occur so early in life that from the start the 
  environment is acting on differently wired brains in boys 
  and girls. Such effects make evaluating the role of 
  experience, independent of physiological predisposition, a 
  difficult if not dubious task. The biological bases of sex 
  differences in brain and behavior have become much better 
  known through increasing numbers of behavioral, 
  neurological and endocrinological studies.

  Sex differences in problem solving have been systematically 
  studied in adults in laboratory situations. On average, men 
  perform better than women at certain spatial tasks. In 
  particular, men seem to have an advantage in tests that 
  require the subject to imagine rotating an object or 
  manipulating it in some other way. They also outperform 
  women in mathematical reasoning tests and in navigating 
  their way through a route. Further, men exhibit more 
  accuracy in tests of target-directed motor skills--that is, 
  in guiding or intercepting projectiles.

  Women, on average, excel on tests that measure recall of 
  words and on tests that challenge the person to find words 
  that begin with a specific letter or fulfill some other 
  constraint. They also tend to be better than men at rapidly 
  identifying matching items and performing certain precision 
  manual tasks, such as placing pegs in designated holes on a 
  board.

  Review 1: Louann Brizendine, a neuropsychiatrist at the 
  University of California, San Francisco, explores 
  groundbreaking issues in brain science...Brizendine 
  graduated from the Yale University School of Medicine and 
  draws on research done at the Women's and Teen Girls' Mood 
  and Hormone Clinic, which she founded at UCSF in 1994.

  Review 2 :This comprehensive new look at the hormonal 
  roller coaster  that rules women's lives down to the 
  cellular level, "a user's guide to new research about the 
  female brain and the neurobehavioral systems that make us 
  women," offers a trove of information, as well as some 
  stunning insights. Though referenced like a work of 
  research, Brizedine's writing style is fully accessible. 
  Brizendine provides a fascinating look at the life cycle of 
  the female brain from birth ("baby girls will connect 
  emotionally in ways that baby boys don't") to birthing 
  ("Motherhood changes you because it literally alters a 
  woman's brain-structurally, functionally, and in many ways, 
  irreversibly") to menopause (when "the female brain is   
  nowhere near ready to retire") and beyond.