Consequently, our understanding of human behaviour derives from an all-male sample then behaviour which deviates is judged an inferior or abnormal (androcentrism)
An overemphasis on evolutionary roles with the male as the provider and female as the homemaker may be over generalised to the characteristics demonstrated in various occupational roles, such as, males as leaders due to their assertive characteristics
Gender bias can have damaging consequences which affect the lives and prospects of women, for instance, they are twice as likely to be diagnosed with depression than men
Women are more likely to be diagnosed with depression and given treatment than males, which may be because women are more likely to suffer from depression, or it could be that the diagnostic system may be biased towards finding depression among women
The expectation that males should be able to 'pull themselves together' is viewed as a masculine trait which may highlight an issue of gender bias within the diagnostic systems
Although psychologist's undergraduate intake is mainly of women, lecturers in psychology departments are more likely to be men, which means that research is more likely to be conducted and published by men which may disadvantage women
The use of a lab experiment could also disadvantage females as they could be placed in an unequal relationship with a male researcher who has the power to label them unreasonable, irrational and unable to complete complex tasks
Research challenging gender biases may not be published, as it is funded less and published by less prestigious journals, consequently, fewer scholars become aware of it or apply it to their own work
Contemporary psychologists have looked for many ways to reduce gender bias, for example, by developing theories that emphasise the importance or value of women