Zybert P, Stein Z, Belmont L
Percept Mot Skills. 1978 Dec;47(3 Pt 1):815-8. doi: 10.2466/pms.1978.47.3.815.
Associations of maternal age at birth and subsequent intelligence test scores of children were examined in a series of over 1500 young men from the Netherlands. All subjects were members of 2-child families and were resident in Amsterdam at age 19 yr. Possible confounding by birth order, spacing interval, social class and sex of sibling were considered. Significant correlations between maternal age and child's ability remained in three of the four possible birth order/social class combinations.
在一项针对1500多名荷兰年轻男性的研究中，对母亲生育时的年龄与孩子随后的智力测试分数之间的关联进行了调查。所有研究对象均来自二孩家庭，19岁时居住在阿姆斯特丹。研究考虑了出生顺序、间隔时间、社会阶层和兄弟姐妹性别等可能存在的混杂因素。在四种可能的出生顺序/社会阶层组合中，有三种组合中母亲年龄与孩子能力之间存在显著相关性。
