Physical attractiveness stereotype
The physical attractiveness stereotype is a term that psychologists use to refer to the tendency to assume that people who are physically attractive also possess other socially desirable personality traits.Many studies have found that people tend to think that more attractive people are also happier, outgoing, intelligent, successful, kinder and have many other positive traits.
Interestingly, in less-individualistic cultures beautiful people are assumed to have traits that those cultures value, such as concern for others, loyalty and integrity.
The stereotype is not always misguided; studies have found that attractiveness does correlate positively with some traits such as personal income, social skills and self-confidence.
This cognitive bias could be considered to be a specfic kind of the halo effect.
See also: list of cognitive biases.