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发表于 2013-5-11 18:25:58
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Mr. Heckman wanted to examine this idea more closely, so he analyzed a few large national databases of student performance. He found that in many important ways, the premise behind the GED was entirely valid. According to their scores on achievement tests, GED recipients were every bit as smart as high-school graduates. But when Mr. Heckman looked at their path through higher education, he found that GED recipients weren't anything like high-school graduates. At age 22, Mr. Heckman found, just 3% of GED recipients were either enrolled in a four-year university or had completed some kind of postsecondary degree, compared with 46% of high-school graduates. In fact, Heckman discovered that when you consider all kinds of important future outcomes - annual income, unemployment rate, divorce rate, use of illegal drugs - GED recipients look exactly like high-school dropouts, despite the fact that they have earned this supposedly valuable extra credential, and despite the fact that they are, on average, considerably more intelligent than high-school dropouts.
赫克曼希望更细致地研究这一观念,因此他对几个有关学生表现的国家级大型数据库进行了分析。他发现,GED背后的前提在许多重要方面都是有依据的。从成绩测验的得分来看,获GED证书的学生完全与高中毕业生一样聪明。然而,赫克曼在进一步研究他们的高等教育历程时发现,获GED证书的学生与高中毕业生的情况差异很大。他发现,在22岁时,获GED证书的学生只有3%的人被四年制大学录取或是修完了中学毕业后的某种学位,而高中毕业生的这一比例为46%。实际上,赫克曼还发现,在考虑到各种各样的重要的未来成就时,例如年收入、失业率、离婚率以及使用非法毒品等方面,获GED证书的学生的表现与高中退学学生是一致的,尽管他们额外获得了这个据信是比较宝贵的证书,而且他们的才智平均要比高中退学学生高出很多。
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