Evolutionary psychologists have brought attention to women’s intrasexual competition in ways that traditional perspectives have overlooked. Whereas most researchers have thus far focused on exploratory investigations of this phenomenon, we experimentally manipulated contextual factors that could affect intrasexual competition (e.g., rival type, presence of a potential mate) and assessed competitive behavior via clothing choice. Across two studies, female MTurk users (NStudy1 = 131; NStudy2 = 262) read a vignette describing an upcoming party then chose an outfit they would wear to that party from a set of clothing items that had been pre-rated on sexiness and revealingness by a separate sample (N = 100). Within the vignette, we inserted participant-provided initials to manipulate the presence of a crush and the familiarity and attractiveness of their female party companion. Unexpectedly, we found a significant difference between outfit ratings for separates compared with dresses, so we incorporated this into our model. In study 1, among women who chose dresses, those who imagined attending the party with a more attractive acquaintance and their crush present chose more attractive outfits than women in the less attractive acquaintance condition. However, no such pattern was found for women who chose separates or women in the close friend condition. In study 2, a pre-registered direct replication showed that women in the acquaintance condition chose more attractive outfits than women in the close friend condition, but only in the crush present condition. Women’s intrasexual competition mechanisms appear cost-sensitive and only prompt competitive tactics when rivals are particularly threatening.

中文翻译：

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是敌是友？伴侣的存在和竞争对手的类型会影响基于服装的女性双性恋竞争

进化心理学家以传统观点被忽视的方式引起了对女性内部竞争的关注。到目前为止，大多数研究人员都集中在对该现象的探索性研究上，而我们实验性地操纵了可能影响性竞争的情境因素（例如，竞争对手的类型，潜在伴侣的存在），并通过服装选择来评估竞争行为。在两项研究中，女性MTurk用户（NStudy1 = 131； NStudy2 = 262）读了一个小插图，描述即将举行的派对，然后从一套针对性和露骨性预先评估过的服装中选择了他们将为该派对穿着的服装。一个单独的样本（N = 100）。在小插图中 我们插入了参与者提供的首字母缩写，以操纵迷恋对象的存在以及他们女方同伴的熟悉度和吸引力。出乎意料的是，我们发现单独的服装评级与礼服的评级之间存在显着差异，因此我们将其纳入了模型。在研究1中，在那些选择礼服的女性中，那些想参加聚会的人比在不那么熟悉的环境中的女性选择了更具吸引力的服装。但是，对于选择分居的妇女或处于密友状态的妇女，没有发现这种模式。在研究2中，预先注册的直接复制显示，相识状态下的女性比密友状态下的女性选择更具吸引力的服装，但仅在暗恋当前状态下选择。