Martin S L, Ramey C T, Ramey S
Frank Porter Graham Child Development Center, University of North Carolina, Chapel Hill 27599-8180.
Am J Public Health. 1990 Jul;80(7):844-7. doi: 10.2105/ajph.80.7.844.
We estimated the effects of an experimental educational day care program on the intellectual development of preschoolers from 86 high-risk families in a randomly allocated longitudinal study. At six through 54 months of age, the IQs of experimental program children ranged from 7.9 to 20.1 points higher than those of control children when maternal mental retardation and home environment effects were controlled; at every age, a greater proportion of the experimental program children had normal range IQs (greater than 84). In 13 children with retarded mothers, none of six experimental program children, but six of seven control children, had IQ scores below normal.
在一项随机分配的纵向研究中，我们评估了一项实验性教育日托项目对86个高危家庭学龄前儿童智力发育的影响。在6至54个月大时，当控制了母亲智力迟钝和家庭环境影响后，实验项目组儿童的智商比对照组儿童高7.9至20.1分；在每个年龄段，实验项目组中智商处于正常范围（高于84）的儿童比例更高。在13名母亲智力迟钝的儿童中，实验项目组的6名儿童中没有一个智商分数低于正常水平，而对照组的7名儿童中有6名智商分数低于正常水平。
