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相关实验视频

Updated: Jul 24, 2025

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兄弟的出生顺序是否会影响双手?

Nathan T Bartlett1, Janessa R Morin1, Peter L Hurd2,3

  • 1Department of Psychology, University of Alberta, Edmonton, AB, T6G 2E9, Canada.

Archives of sexual behavior
|July 6, 2023
PubMed
概括

关于男性性取向的兄弟出生顺序效应 (FBOE) 受影响的因素也影响了手性. 父母年龄是FBOE分析的关键混因素,影响性取向和双手性.

关键词:
女人的生育能力.兄弟的出生顺序 兄弟的出生顺序双手性是指使用双手.母亲的年龄 母亲的年龄母亲免疫假设 母亲免疫假设父亲年龄 父亲年龄

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科学领域:

  • 心理学 心理学 心理学
  • 人类的性行为.
  • 行为遗传学 行为遗传学

背景情况:

  • 兄弟出生顺序效应 (FBOE) 表明,在有更多大哥哥的男性中,同性恋倾向的可能性增加.
  • 有证据表明,FBOE对右撇子男性是特有的,而左撇子男性没有这种影响.
  • 关于区分FBOE与像女性生育效应 (FFE) 这样的混效应存在争论.

研究的目的:

  • 将FBOE的最新分析方法应用于手性特征.
  • 在FBOE研究中调查潜在的混因素,例如父母年龄.
  • 探索男性和女性对性取向和手性的共同影响.

主要方法:

  • 将Khovanova的技术应用于手性数据,最初显示了类似FBOE的效果.
  • 对父母年龄的混影响进行控制.
  • 利用模型同时测试多种假设的影响 (FFE,父母年龄,出生顺序) 在手性.

主要成果:

  • 一项初步分析表明FBOE在手性,与母体免疫假设一致.
  • 当控制父母年龄的影响时,这种类似于FBOE的手性效应消失了.
  • 多因素模型揭示了女性生育能力,父亲年龄和出生顺序对男性手性的显著影响,但没有FBOE. 女人表现出不同的模式,受老兄弟姐妹的出生顺序和性别的影响.

结论:

  • 影响男性性取向的因素也可能影响手性.
  • 父母年龄在FBOE分析中是一个重要的混因素,应该仔细考虑.
  • 这项研究突出了影响性取向和双手性因素的复杂性,在两性之间观察到不同的模式.