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  3. Researchers are increasingly interested in manipulating the environment early in children’s lives when they are perceived to be

Researchers are increasingly interested in manipulating the environment early in children’s lives when they are perceived to be

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问题     Researchers are increasingly interested in manipulating the environment early in children’s lives when they are perceived to be at risk for impoverished intelligence. In a program conducted in North Carolina by Craig Ramey and his associates, pregnant women with IQs averaging 80 were recruited for a study. After their babies were born,half of the infants were cared for during the day at an educational daycare center and half were reared at home by their mothers; both groups of children were given medical care and dietary supplements, and their families were given social services if they requested them.
    At the age of 3, the children who attended the educational daycare center had significantly higher IQs than did the home-reared children. This difference was likely due to the decline in the IQs of the home-reared children during the period from 12 to 18 months of age. By the time the children were 5 years old, 39 percent of the home-reared children had IQs below 85 but only 11 percent of the educational day-care children had IQs this low. In the most recent evaluation of this project, positive effects of educational daycare on the intellectual development and academic achievement of the children were evident at age 12.
    Some parents, such as those in Ramey’s study, have difficulty providing an adequate environment for the intellectual needs of their infants. Once these difficulties are a reoccurring part of the family system, changing efforts probably will be more difficult and costly; early intervention in the family system is directed at changing parental adaptive and responsive functioning so that permanent negative effects are minimized.
    In another investigation, the Infant Health and Development Program, early intervention with low-birth weight children revealed that both home visitation and an educational child curriculum improved the children’s IQ, decreased behavior problems, and improved the home environment. The intervention was more effective with mothers with low educational attainment than those with high educational attainment, more effective for African American than White children, and effective for most at-risk children.
    Intervention programs have the most positive effects on children’s well-being when they (a) begin as early as possible, (b) provide services to parents as well as to the child, (c) have a low child-teacher ratio, (d) have high parental involvement, and (e) have frequent contacts. In one review of family intervention studies, intervention was more effective when there were eleven or more contacts between the intervener and the family; while eleven sessions is a somewhat arbitrary number, it does indicate that a certain duration of contact is necessary for intervention success.
It is clear from the passage that the author advocates
选项 A、providing enough daycare centers for children of working mothers.
B、early intervention in children’s intellectual growth.
C、the natural development of children’s intelligence.
D、depriving poor mothers of the opportunities to raise their children at home.
答案B
解析 细节题。文章第三段指出，对家庭的早期干预的目的是为了改变父母对孩子所起有适应性的、易起反应的作用，以便将其持久的负面影响减少到最低限度；第四段指出，早期干预对于那些受教育少的母亲更有效，对非洲裔美国小孩比对白人小孩更有效，对大多数有智力缺陷的小孩更有效；最后一段指出，干预计划对孩子的幸福有最积极的影响。这说明，作者倡导对孩子的智力发展进行早期干预。这与B项的意思相符。文中没有提到A、D；C是作者反对的观点。
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