This agrees with the anecdotes I've felt personally and discussed with other female engineers. It's also present long past intro classes, in my experience
perbites.org/2019/01/16/who…
Women in engineering constantly FEEL that they're not succeeding enough in a way that far outweighs most of the men around them
I think it's because women who are more typical or average in their engineering classes think they're failing & leave
There's a pool of potential successful and competent female engineers that we're losing because of phenomena like this