> Continuing an uninterrupted trend that dates back to at least 1972, high school boys outperformed girls on the 2015 SAT math test with an average score of 527 points compared to the average score of 496 for females, see chart above. The statistically significant 31-point male advantage this year on the SAT math test is the same as the 31-point difference last year, and just slightly below the 33.9 point difference over the last two decades favoring boys.
> (...T)here were 165.3 boys with SAT math scores between 700-800 points for every 100 girls with scores in that range. For the next highest 100-point range between 600-700 points for the 2015 SAT math test, there were about 121 boys with scores in that range for every 100 high school girls (55% boys vs. 45% girls).
There's quite a lot of data out there. I suspect there's not a lot of research into the topic because it's so politically charged.
http://www.aei.org/publication/2015-sat-test-results-confirm...
https://en.wikipedia.org/wiki/Sex_differences_in_psychology#...
The data isn't politically charged, but the interpretation can be.
This problem amplifies itself, as the inability to acquire good data leads to a politicization of the science. Without the ability to perform, replicate or refute experiments, the scientists focus on convincing their peers through prose and essays.