https://my.vanderbilt.edu/smpy/ http://www.aps.org/publications/apsnews/199607/gender.cfm"According to Zappardino, gender differences can certainly be manipulated by selected different test items. For example, for the first several years when the SAT was offered, boys scored higher than girls on the math section, while girls achieved higher scores on the verbal section. The ETS decided the verbal test needed to be balanced more in favor of boys, and added more questions pertaining to politics, business and sports. No similar efforts were made to balance the math section. "Since then, boys have outscored girls on both the math and verbal sections," said Zappardino. "So when girls show a superior performance, balancing is required; when boys show the superior performance, no adjustment is necessary."
http://fairtest.org/test-makers-revise-nat-merit-exam-address-gender-bias-fairtest-complaint-will-lead-millions-more-gir