>it waters down the premise Couple of points here. A culture biased along gender lines may bias the outcome thus obscure the effect of genetics on gender diffe

>it waters down the premise Couple of points here. A culture biased along gender lines may bias the outcome thus obscure the effect of genetics on gender differences. Also, no one in their right mind claims that environment has no effect, and so measuring some environmental influence doesn't undermine the greater male variability hypothesis. >And what is unusual about Czech Republic I wouldn't hazard a guess, but the "paradoxical effect" of gender equality negatively correlating with female interest in STEM might have some hard-to-tease-out influence here.