In 2005, Lawrence Summers, then president of Harvard University, set off a storm of controversy when he suggested it could be due partly to innate differences in ability; others have suggested discrimination or socialization is more to blame. Two psychological scientists have reviewed all of the evidence and concluded that the main factor is women's choices -- both freely made, such as that they'd rather study biology than math, and constrained, such as the fact that the difficult first years as a professor coincide with the time when many women are having children.
Psychological scientists Stephen Ceci and Wendy Williams of Cornell University set out to understand the differences between men and women in math-intensive fields such as physics, electrical engineering, computer science, economics, and chemistry. In the top 100 U.S. universities, only 9% to 16% of tenure-track positions in these kinds of fields are held by women.
But girls' grades in math from grade school through college are as good as or better than boys', and women and men earn comparable average scores on standardized math tests. However, twice as many men as women score in the top 1% on tests such as the SAT-M. Clearly, the picture is complex, Ceci and Williams decided. Their analysis and conclusions appear in Current Directions in Psychological Science, a journal of the Association for Psychological Science.
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