Some psychological research has been accused of alpha bias in the sense that it exaggerates differences between the sexes or between different cultures which could perpetuate stereotypes that often exist – e.g androcentric and ethnocentric
For example, psychologists who have replicated Milgram's research found that women are more obedient than men
Moreover, there is a danger that this could result in beta bias, where research underplays the differences between groups to appear more politically correct
For example, assuming women and men are equally prone to depression.