Alzate-Pamplona Fraidy-Alonso, Galindo-Caballero Óscar, Escudero Juan Pablo Sánchez, Zapata Johny Villada
Facultad de Ciencias de la Salud, Fundación Universitaria María Cano. Medellín, Colombia. Fundación Universitaria María Cano Facultad de Ciencias de la Salud Fundación Universitaria María Cano Medellín Colombia.
Programa de Psicología, Facultad de Ciencias Sociales y Humanas, Universidad Manuela Beltrán. Bogotá, Colombia. Universidad Manuela Beltrán Universidad Manuela Beltrán Bogotá Colombia.
Int J Psychol Res (Medellin). 2023 Jun 20;16(1):6-15. doi: 10.21500/20112084.5919. eCollection 2023 Jan-Jun.
it seems that, in the phase of greatest fertility, women's intrasexual competition (toward attractive women who live nearby) increases due to access to resources, status, and biologically desirable partners.
to compare the economic decisions (ED) during the ovulatory (OP) and luteal (LP) phases of the menstrual cycle (MC) with exposure to two stimuli: a photograph of a more attractive woman and a photograph of a less attractive woman, through the ultimatum game (UG).
the research followed a cross-sectional design between subjects to see group differences by contrasting hypotheses. The sampling was probabilistic, with a sample of 100 heterosexual women, students at a public university with an age range of 18 to 24 years, with regular MC, who did not use hormonal contraceptive methods and did not have any endocrine condition. The inverse counting method with confirmation was applied to identify CM phases; and the UG to evaluate the DE.
the phases of the MC had no effect on the ED; the women behaved similarly in their decisions, regardless of the phase of the cycle they were in or the type of stimulus to which they were exposed.
OP and LP do not affect the ED of women when they are exposed to an attractive stimulus. The discussion is made considering the evolutionary theory of the ovulatory shift hypothesis.
在生育能力最强的阶段，由于能够获取资源、地位以及生物学上理想的伴侣，女性的同性竞争（针对居住在附近的有魅力女性）会增强。
通过最后通牒博弈（UG），比较月经周期（MC）的排卵期（OP）和黄体期（LP）女性在接触两种刺激时的经济决策（ED），这两种刺激分别是更有魅力女性的照片和魅力稍逊女性的照片。
本研究采用受试者间的横断面设计，通过对比假设来观察组间差异。抽样为概率抽样，样本包括100名异性恋女性，她们是一所公立大学的学生，年龄在18至24岁之间，月经周期规律，未使用激素避孕方法且没有任何内分泌疾病。采用带确认的倒数计时法来确定月经周期阶段；并使用最后通牒博弈来评估经济决策。
月经周期阶段对经济决策没有影响；无论处于月经周期的哪个阶段或接触何种类型的刺激，女性在决策中的表现都相似。
当接触有吸引力的刺激时，排卵期和黄体期不会影响女性的经济决策。讨论是基于排卵转移假说的进化理论进行的。
