FAMILY SIZE, BIRTH ORDER, AND INTELLIGENCE

这一持续研究的目标是检查两个 相关问题：(1)测量的智力之间的关系 和家庭规模的关系；以及(2)被测量的 智力和出生顺序。分析将以数据为基础 来自威斯康星州的纵向研究。 我们的第二篇研究论文关于智力与 家庭规模将集中在这样一个问题上：“智力如何 这项研究将包括PATH和其他 多变量分析背景因素、智商和 介入性因素影响生育率。 将对出生顺序对智商的影响进行研究 首先以通常的方式从完整的家庭间数据 威斯康星州的样本。第二种也是更新颖的方法将 使用来自威斯康星州兄弟姐妹样本的家庭内数据 将使用以出生为索引的受试者-兄弟姐妹智商差异 应答者和兄弟姐妹的顺序，作为因变量。这 家庭内部差异自动控制多个 混淆因素，因为被调查者和兄弟姐妹具有相同的特征 父母。因此，第二种方法承诺提供更多 结果比第一次提供的信息要多。威斯康星州的同胞样本是 比第一次更适合测试关键结果。威斯康星州 SIB样本非常适合检验最新的关键预测 出生顺序的Zajonc-Markus汇合模型的版本 和相关的家庭结构变量影响智力 发展。这个测试汇流模型，这也将 包括对兄弟姐妹规模影响调查，将形成一个主要的 继续研究的重点。 研究将继续解决有关人口的问题 来自原籍家庭大小关联的质量 以及兄弟姐妹的地位与测量的智商和联想 智力水平与生育能力的关系。

The objective of this continuing reaserch is to examine two related questions: (1) the relation between measured intelligence and family size; and (2) the relation between measured intelligence and birth order. The analyses will be based on data from the Wisconsin Longitudinal Study. Our second research paper on the relation between intelligence and family size will focus on the question, "How Intelligence Affects Fertility." The research will include path and other multivariate analyses of how background factors, IQ, and intervening factors affect fertility. The research on the influence of birth order on IQ will be done first in the usual way with between-families data from the full Wisconsin sample. The second and more novel approach will employ within-families data from the Wisconsin sib sample and will use the respondent-sib difference in IQ, indexed by birth orders of respondent and sib, as the dependent variable. This within-family difference automatically controls for many confounding factors, since respondent and sib share the same parents. The second approach therefore promises to give more informative results than the first. The Wisconsin sib sample is well-suited to test the key results than the first. The Wisconsin sib sample is well-suited to test the key prediction of the latest version of the Zajonc-Markus confluence model of how birth order and related family structure variables affect intellectural development. This test of the confluence model, which will also include investigation of sibship size effects, will form a major focus of the continuing research. The research will continue to address questions about population quality deriving from the associations of size of family of origin and sibling position with measured intelligence and the association of measured intelligence with fertility.