ABSTRACT
Introduction Groups and teams have been a major focal point of psychological and sociological theory and research. An understanding of groups is necessary for almost every analysis of social behaviour, including, leadership, majority-minority relations, status, role dierentiation and socialisation (Levine and Moreland, 1998). Furthermore, small groups provide important contexts within which other behaviour occurs e.g. attraction, aggression and altruism (Geen 1998; Batson 1998). At a functional level, people spend much of their lives in collectives of some kind; e.g. families, school classes and sports teams, and these groups provide members with vital material and psychological resources.
