Gender bias in science
Using gender stereotypes, rather than checking the true role: Tools that are used by doctors to identify some mental illnesses (such as clinical depression or ADHD) often use stereotyped gender roles. For example, in girls, being hyperactive is often seen as good thing. Many people think that girls are supposed to talk and smile often. In boys, being hyperactive is seen as a weakness. Another example is that in many societies in which men are in charge, men are often seen as normal, and no one questions or thinks much about that. An androcentric view happens, which is biased towards men.