Wilson R S, Matheny A P
Behav Genet. 1976 Jul;6(3):353-8. doi: 10.1007/BF01065730.
A reappraisal is made of Nichols and Broman's conclusion that there is no evidence that genetic influences are important in infant mental development if severely retarded twins are excluded from the sample. The reappraisal touches on certain idiosyncrasies of their sample, the test scores reported, and their definition of severe retardation. Data are presented for a sample of White twins who have been followed longitudinally since birth. For Bayley Mental Scale scores at 9 months of age, the monozygotic within-pair correlation was 0.85 and the dizygotic within-pair correlation was 0.62. With 13 retarded twins excluded, the correlations became 0.81 and 0.64, respectively, with the monozygotic correlation still being significantly larger (p less than 0.01). The present results indicate that genetic factors play a role in infant mental development.
对尼科尔斯和布罗曼的结论进行了重新评估，他们的结论是，如果从样本中排除重度智障双胞胎，就没有证据表明基因影响在婴儿智力发育中起重要作用。重新评估涉及他们样本的某些特质、所报告的测试分数以及他们对重度智障的定义。给出了自出生以来一直进行纵向跟踪的白人双胞胎样本的数据。对于9个月大时的贝利智力量表分数，同卵双胞胎对内相关性为0.85，异卵双胞胎对内相关性为0.62。排除13对智障双胞胎后，相关性分别变为0.81和0.64，同卵双胞胎的相关性仍然显著更大（p小于0.01）。目前的结果表明，遗传因素在婴儿智力发育中起作用。
