Why Young Girls Don't Think They Are Smart Enough
January 26, 2017
By Andrei Cimpian and Sarah-Jane Leslie
New York Times

Originally Posted by article
When we asked children to guess which of four children, two boys and two girls, would get the best grades in school, girls picked mostly other girls. In other words, the girls we tested were aware that girls do better in school than boys, but that didn’t change their ideas about who’s “smart.”
The authors observed that children's perceptions did not vary by SES, and that more positive role models of brilliant women, and a more equal distribution of household chores are protective factors... exposing children to these early and consistently may help balance their perceptions and career aspirations.

Related post in Research forum: research published in the journal Science, AAAS (American Association for the Advancement of Science)