Read More: Impostor Syndrome, High-Achievers, Impostor Phenomenon, Career Advice for Women, Women and Work, Women High-Achievers, Manfred F. R. Kets De Vries, Lowering Expectations, Success Tips, High Expectations, Pressure to Succeed, Women News
If you don't think you can live up to other people's expectations then it makes sense you'd try to protect yourself by minimizing expectations. So you decide that it's better to play small than to risk humiliation. Plus, you get extra points for being modest -- especially if you're female.
Often high achieving women refuse to accept their intellectual abilities and demonstrated success, instead preferring to assign themselves the role of the impostor.