Dual identification occurs when both subgroup and superordinate group are moderately inclusive

Evidence

Furthermore, we think it possible that a dual identity can be engaged by a group’s optimal distinctiveness. Given that a social category’s inclusiveness is derived from differentiation from comparable out-groups, individuals will be most likely to identify with the subgroup and the superordinate group simultaneously to the extent that both are perceived to be moderately inclusive relative to comparable out-groups. — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 699

Categorization

• corroborated: 2 independent passages support this claim — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 699