A popular quiz on 16 sex differences of ability or behavior was answered by graduate students and by members of an elementary psychology class a few days after a lecture on the lack of proof of sex differences. A majority of students believed in the stereotypes, with men and women agreeing on most items, including the general superiority of the male. Intellectual appeals are ineffective in changing emotionally rooted stereotypes. (PsycINFO Database Record (c) 2006 APA, all rights reserved)