psychology -stereotyping

…

…very useful in explaining our interpersonal perception and of how and why we form such biases and stereotypes of people, and even entire groups in society. Whether we are making implicit assumptions about their personality traits, or using situational and dispositional inferences about the causes of their behaviour; our assumptions and inferences of other people are generally formed relatively quickly, and once a stereotype has been formed, people can be extremely reluctant to abandon them!