McKay H, Sinisterra L, McKay A, Gomez H, Lloreda P
Science. 1978 Apr 21;200(4339):270-8. doi: 10.1126/science.635585.
Beginning at different ages in their preschool years, groups of chronically undernourished children from Colombian families of low socioeconomic status participated in a program of treatment combining nutritional, health care, and educational features. By school age the gap in cognitive ability between the treated children and a group of privileged children in the same city had narrowed, the effect being greater the younger the children were when they entered the treatment program. The gains were still evident at the end of the first grade in primary school, a year after the experiment had ended.
来自哥伦比亚社会经济地位低下家庭的长期营养不良儿童群体，从学前阶段的不同年龄开始，参加了一个结合营养、医疗保健和教育特色的治疗项目。到入学年龄时，接受治疗的儿童与同一城市的一群有特权的儿童在认知能力上的差距已经缩小，儿童进入治疗项目时年龄越小，效果越明显。在实验结束一年后的小学一年级末，这些进步仍然很明显。
