It is a well known fact that boys have a higher variance on high school math tests than girls. No one knows what causes this - maybe there are different social pressures on boys, maybe boys test differently, maybe boys are innately different. Anyways, the results of the latest study which, again, showed
higher male variance are
still being
misreported:
26. Girls and boys now perform equally on standardized high school mathematics tests across North America, ending a gender gap that lasted for decades.
The source for this quote is the study I linked to, which showed that the extreme scores are more likely to be male's scores. The study showed major differences in the scores! Of the major media outlets, only the WSJ
got it right the first time around. Of course the bad information
was passed on.
What shocks me about all of the coverage is that no one has reported the differences between whites' scores and Asian-Americans' scores in the study. While the results from white Americans fell in line with previous results, namely that twice as many boys as girls were expected in the 99th percentile on math tests, this wasn't true for Asian-Americans. An Asian-American female was actually a hair more likely to be in the top percentile than an Asian-American male, though this fact didn't hold for the top five percent of scores. I haven't seen quantitative studies on differences in values across different racial groups, but from anecdotes and personal experience I think that Asian-Americans parents have fewer differences in expectations from daughters and sons. This is the first data (I've seen) which supports the variance difference being an environmental one. There wasn't enough data on any other group to make it into the study.
