A bit later than intended, but here are some useful sources related to my post. I'd recommend the stereotype threat wikipedia article and the Handbook of Socialization as the best overviews for those less familiar to the topic.

Stereotype threat: - good synopsis at http://en.wikipedia.org/wiki/Stereotype_threat - most relevant source article (unfortunately subscription-protected, but I think a lot of people here have some sort of institutional access): Murphy MC et al, "Signaling threat: how situational cues affect women in math, science, and engineering settings." Psychol Sci. 2007 Oct;18(10):879-85.

Basic overview of childhood gendered socialization: http://gozips.uakron.edu/~susan8/parinf.htm

Other stuff:

Handbook of Socialization: Theory and Research, edited by Joan E. Grusec and Paul D. Hastings (2007).
Excerpt here: http://www.sscnet.ucla.edu/CBD/downloads/week9_LeaperCh22.pdf
(Particularly relevant is the section on peer-sensitivity and the tendency to downplay achievements or ability in an area considered to "belong" to the other gender.)

Claire Etaugh, Marsha B. Liss, Home, school, and playroom: Training grounds for adult gender roles, Sex Roles, Volume 26, Issue 3 – 4, Feb 1992, Pages 129 – 147