Lawrence Summers Vindicated By New Study: Male Test Scores ARE More Variable Than Female Scores
Wall Street Journal -- Girls and boys have roughly the same average scores on state math tests, but boys more often excelled or failed, researchers reported. The fresh research adds to the debate about gender difference in aptitude for mathematics, including efforts to explain the relative scarcity of women among professors of science, math and engineering.
The latest study, in this week's journal Science, examined scores from seven million students who took statewide mathematics tests from grades two through 11 in 10 states between 2005 and 2007.
The researchers, from the University of Wisconsin and the University of California, Berkeley, didn't find a significant overall difference between girls' and boys' scores. But the study also found that boys' scores were more variable than those of girls. More boys scored extremely well -- or extremely poorly -- than girls, who were more likely to earn scores closer to the average for all students. The study found that boys are consistently more variable than girls, in every grade and in every state studied (see crude diagram above - showing distributions where mean intelligence is the same, but the standard deviation of male intelligence is greater than female intelligence).
In Minnesota, for example, 1.85% of white boys in the 11th grade hit the 99th percentile, compared with 0.9% of girls -- meaning there were more than twice as many boys among the top scorers than girls.
MP: And it might just be the case that those students who score in the 99th percentile on standardized tests are the future genius-level scholars in math, science, physics and engineering who are able to succeed and get tenure as professors at extremely competitive universities like Harvard, Yale, MIT, etc. In that case, we would expect an over-representation (under-representation) of men (women) in those positions for reasons that have NOTHING to do with discrimination, and everything to do with genetics and the variability of intelligence.
Q: Does this means that Larry Summers gets his job back at Harvard, since he was simply disccussing scientific research like the study above? Or doesn't he at least deserve some apologies?
HT: Clover Aguayo
See related Marginal Revolution post here.