Multivariate models of mixed assortment: Phenotypic assortment and social homogamy for education and fluid ability
Multivariate models of mixed assortment: Phenotypic assortment and social homogamy for education and fluid ability
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DOI：
10.1023/a:1010250818089
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发表时间：
2000-11-01
影响因子：
2.6
通讯作者：
Pedersen, NL
中科院分区：
文献类型：
--
作者：
Reynolds, CA;Baker, LA;Pedersen, NL
在大多数生物统计学研究中，表型配搭被认为是配偶相似性的主要机制。其他分类机制，如社会同性婚姻，可能是合理的。提出了两种同时考虑表型配种和社会同质配种的模型（即混合配种），其中社会背景因素之间的选择性关联（模型I）与总环境之间的选择性关联（模型II）区分了两种模型。对116对瑞典双胞胎及其配偶的教育和流动能力进行了一系列说明性分析。在几个拟合标准的基础上，模型I优于模型II。社会同性婚姻和表型分类都可能有助于配偶在教育程度和流动能力方面的相似性。此外，配偶在流动能力方面的相似性可能间接来自于社会同性婚姻和受教育程度的表型分类。功率分析表明模型1的观测功率大于模型2。额外的功率分析表明，模型II比模型I需要更多的双配偶组合来解决社会同性婚姻和表型分类问题。本文还简要讨论了配偶相似性机制不规范的影响。
Phenotypic assortment is assumed to be the principal mechanism of spouse similarity in most biometrical studies. Other assortment mechanisms, such as social homogamy, may be plausible. Two models are presented that consider phenotypic assortment and social homogamy simultaneously (i.e., mixed assortment), where selective associations between social background factors (Model I) versus selective associations between total environments (Model II) distinguish the models. A series of illustrative analyses was undertaken for education and fluid ability available on a sample of 116 Swedish twin pairs and their spouses. On the basis of several fit criteria Model I was preferred over Model II. Both social homogamy and phenotypic assortment may contribute to spouse similarity for educational attainment and fluid ability. Furthermore, spouse similarity for fluid ability may arise indirectly from social homogamy and phenotypic assortment for educational attainment. Power analyses indicated greater observed power for Model I than Model II. Additional power analyses indicated that considerably more twin-spouse sets would be needed for Model II than Model I, to resolve social homogamy and phenotypic assortment. Effects of mis specification of mechanisms of spouse similarity are also briefly discussed.