"Joshi and Roh note that their analysis helps to pinpoint “the specific conditions under which diversity can have beneficial or detrimental effects on performance outcomes” (p. 618)—specifically, sociodemographic diversity is most likely to be deleterious when it is unbalanced (large majority, small minority) in highly task-interdependent teams. But it is important to bear in mind that these negative effects are quite small.14 Thus, Joshi and Roh note that “our findings challenge the assumption, born from social categorization theory, that some aspects of diversity necessarily have detrimental effects on team performance.” Similarly, King, Hebl, and Beal (2009) suggest that “although social categorization theory (the primary model that would apply to cooperative behaviors) would typically suggest that similarity fosters cooperation, there is substantial evidence that this is not always the case.”"