[identity profile] capsicumanuum.livejournal.com 2006-08-31 05:45 pm (UTC)(link)
I read about a similar study involving male and female asian-americans. When questioned about their race prior to the test, women and men performed equally well, but when questioned about gender, the women significantly lagged behind the men.

[identity profile] astra-nomer.livejournal.com 2006-09-01 01:49 pm (UTC)(link)
I had a seen a previous study a while back where under normal conditions, women did worse than men on a standardized math test. Same test, different group, but told that the test was designed to be gender-neutral, and the gender gap vanished. But this is the first study I've seen where they managed to actively eliminate the gender gap.