The matching hypothesis (also known as the matching phenomenon) argues that people are more likely to form and succeed in a committed relationship with someone who is equally socially desirable, typically in the form of physical attraction. The hypothesis is derived from the discipline of social psychology and was first proposed by American social psychologist Elaine Hatfield and her colleagues in 1966.
Successful couples of differing physical attractiveness may be together due to other matching variables that compensate for the difference in attractiveness. For instance, some men with wealth and status desire younger, more attractive women. Some women are more likely to overlook physical attractiveness for men who possess wealth and status.
It is also similar to some of the theorems outlined in uncertainty reduction theory, from the post-positivist discipline of communication studies. These theorems include constructs of nonverbal expression, perceived similarity, liking, information seeking, and intimacy, and their correlations to one another.