www-news.uchicago.edu/releases/07/070524.beilock.shtml
A popular stereotype that boys are better at mathematics than girls undermines girls’ math performance because it causes worrying that erodes the mental resources needed for problem solving, new research at the University of Chicago shows.
The scholars found that the worrying undermines women’s working memory. Working memory is a short-term memory system involved in the control, regulation and active maintenance of limited information needed immediately to deal with problems at hand.