The human brain is an amazing organ. It functions 24 hours a day from the day we are born and only stops when we are taking an exam or fall in love.
A lack of confidence is a huge reason why most women undervalue themselves in salary negotiations. At the same time, a reluctance to ask for more money may also be based on a keen understanding of the social realities for women who do ask.
For instance, observers who watched videos of men and women in mock job interviews not only perceived the women who asked for more to be ‘less nice’ and ‘more demanding,’ but also said they’d be significantly less willing to work with a female candidate who attempted to negotiate her salary than with one who did not. It’s worth noting that while the men in this study penalized female candidates who asked, women penalized both male and female candidates who attempted to negotiate.