role theory
a conceptual explanation of social behavior that assumes individuals’ actions are defined, in part, by the role they occupy in a relationship, such as father, daughter, group member, leader, employee, boss, and so on. The theory suggests that by enacting roles individuals establish exchange relationships with one another, building interdependence that is essential for social coordination. See also role ambiguity; role conflict; role differentiation; role diffusion; role expectations; social role.