性取向与两性2D:4D指长比率有关:一个更新和扩展的元分析
Ashlyn Swift-Gallant1, Toe Aung2, Stephanie Salia1
1Department of Psychology, Memorial University of Newfoundland and Labrador, St. John's, NL, Canada.
Frontiers in psychology
|May 12, 2025
概括
2D:4D指数比,是产前激素的标记,显示同性恋个体的差异. 女同性恋者比异性恋者有更多的男性比例,而男同性恋者比异性恋者有更多的女性比例.
科学领域:
- 内分泌学 在内分泌学.
- 心理学 心理学 心理学
- 人类的性行为.
背景情况:
- 2D:4D指数比是产前性腺激素暴露的建议标记.
- 以前的研究表明,2D:4D比率与性取向之间存在联系,但研究结果不一致,特别是在男性和双性恋人群中.
- 现有的元分析没有纳入未发表的数据或单独检查双性恋个体.
研究的目的:
- 对2D:4D手指比例与性取向之间的关系进行更新和扩展的元分析.
- 研究两性异性恋,同性恋和双性恋个体之间的2D:4D比率的差异.
- 通过包括未发表的数据集和明确分析双性恋个体来解决以前的元分析的局限性.
主要方法:
- 进行了全面的元分析,结合了51项研究的数据.
- 分析包括44个男性和34个女性数据集,共计227,648名参与者.
- 使用统计方法,包括修剪和填充和遗漏分析,以评估可靠性和潜在的出版偏差.
主要成果:
- 与异性恋女性相比,同性恋女性的2D:4D比率较低 (更具男性性).
- 与异性恋男性相比,同性恋男性的2D:4D比率更高 (更具女性性).
- 在异性恋和双性恋两性之间没有发现2D:4D比率的显著差异.
结论:
- 这些发现支持这样一个假设:产前安卓激素暴露会影响性取向,更高的暴露与对女性的吸引力相关,而较低的暴露与对男性的吸引力相关.
- 2D:4D比率似乎是女性和男性性取向的可靠指标,在同性恋个体中观察到不同的模式.
- 该研究强调了包括未发表的数据和分析各种性取向的重要性,以实现对荷尔蒙对人类性行为的影响的全面理解.
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