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Psychological essentialism is the tendency to view entities as if they have an underlying, often invisible essence that makes them what they are (Medin & Ortony, 1989), and the presence of a genetic basis for group membership contributes to such conceptions (Dar-Nimrod & Heine, 2011; Keller, 2005). We argue that undergoing visually salient physical transformations in the process of becoming a group member leads to particularly heightened essentialist conceptions. We test this idea in the context of parenthood. Public discourse suggests the category mother is imbued with special properties and is viewed as a deeper, more lasting, and real category than father. Such perceptions may contribute to unequal work outcomes for women relative to men. Collectively, the 5 studies reported show that mothers are perceived in more essentialist terms than fathers, and that physical changes women undergo in the process of becoming mothers play a substantial role in producing this difference. Moreover, viewing mothers as a particularly natural and real category predicted judgments that women struggle to successfully manage their roles as mothers and professionals, but only when motherhood was biological in nature. The role that observable physical transformations may play in the reification of categories is discussed. (PsycINFO Database Record (c) 2015 APA, all rights reserved)
