I remember a report of a study of young men and young women doing math problems alone in a cubicle, both clothed and in their underwear. Apparently, the young men weren't significantly affected by their clothing levels, while the young women did significantly worse when asked to take the tests wearing only underwear. The researcher planned to run similar tests for reading skills. But of course I'm wondering: are young women missing out on otherwise valueable semi-clothed practice time?