Measurement models for sexual orientation in a community twin sample
Measurement models for sexual orientation in a community twin sample
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DOI：
10.1023/a:1026557719181
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发表时间：
2000-07-01
影响因子：
2.6
通讯作者：
Martin, NG
中科院分区：
文献类型：
--
作者：
Kirk, KM;Bailey, JM;Martin, NG
多元结构方程建模技术已被应用于研究对性取向的几个项目的反应的个体差异的原因。为了尽量减少潜在的确定和反应偏差，研究样本包括一个大的（N = 4901）基于社区的队列，年龄在18-52岁的澳大利亚双胞胎，他们回答了一份关于性行为和态度的匿名问卷。通过对性取向（行为、态度和感受）的多重测量，该分析的统计能力得到了提高，与之前的分析相比，该分析提供了更有力的证据，证明存在可加性基因对这种表现型的影响（Bailey et al., 2000）。在该样本中，同性恋的遗传率在女性中估计在50%到60%之间，但在男性中则明显较低（遗传率约为30%）。
Multivariate structural equation modeling techniques have been applied to examine the causes of individual differences in responses to several items concerning sexual orientation. To minimize potential ascertainment and response biases, the study sample involved a large (N = 4901) community-based cohort of Australian twins aged 18-52 who answered an anonymous questionnaire on sexual behavior and attitudes. The statistical power of the analysis was increased by the availability of multiple measures of sexual orientation (behaviors, attitudes and feelings), providing stronger evidence for the existence of additive genetic influences on this phenotype than in a previous analysis (Bailey et al., 2000). Estimates of the heritability of homosexuality in this sample ranged between 50 and 60% in females but were significantly lower (heritability of approximately 30%) in males.