Group identification is strongest at intermediate group sizes balancing distinctiveness and belonging.

Evidence

Brewer’s (1991) Optimal Distinctiveness Theory, for example, has proposed that social identification should be considered as deriving from two opposed psychological needs: differentiation and assimilation. According to this account, identification with a group will be “optimal” when these two needs balance each other out, and this is most likely to occur in groups of intermediate size – neither so large as to threaten the need to see oneself as “different,” nor so small as to challenge the need to see oneself as connected to others. — , Rudman, Laurie A - On the Nature of…, 433 (#corroborates, via linked claim)

Brewer’s (1991) Optimal Distinctiveness Theory, for example, has proposed that social identification should be considered as deriving from two opposed psychological needs: differentiation and assimilation. According to this account, identification with a group will be “optimal” when these two needs balance each other out, and this is most likely to occur in groups of intermediate size – neither so large as to threaten the need to see oneself as “different,” nor so small as to challenge the need to see oneself as connected to others. — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice, 433 (#corroborates, via linked claim)

Because simplicity is a virtue in the world of agent-based modeling, our first attempt at examining individual-level social identification processes and subsequent macrolevel outcomes centered on the relatively simple question of how the individual-level desire for membership in an optimally distinct group influences group formation and dissolution processes. In existing experimental tests of ODT, arousal of inclusion and distinctiveness needs led study participants to exhibit a preference for groups that were most likely to meet those needs (e.g., groups that were at an optimal level of inclusiveness). However, a group’s level of inclusiveness is not static and, in fact, may be in a constant state of flux particularly when group boundaries are relatively permeable. This led us to the assumption that the desire for optimal distinctiveness at the individual level pushes individuals toward joining or leaving the groups based on the size of the group and the individual’s preferred level of group inclusiveness. — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 835 (#expands, via linked claim)

Categorization

• XREF: connects to: Humans balance opposing needs for belonging and uniqueness through group identification. — Anna X. Huang, Jacqueline M. Chen, and Juliane Degner, Being One or the Other, Both or…, 96; Dual identity merges sub-group distinctiveness with super-group inclusion to reduce conflict; Optimal distinctiveness needs drive individuals to join or leave groups by size — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 835 (+5 more)

Broader Connections

• Social identification peaks in groups of intermediate size balancing two opposing needs #corroborates (1.00) — , Rudman, Laurie A - On the Nature of…, 433
• Group identification is optimal when differentiation and assimilation needs balance #corroborates (0.95) — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice, 433
• Optimal distinctiveness needs drive individuals to join or leave groups by size #expands (0.92) — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 835