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蓝皮340关于identical twins的问题

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楼主
发表于 2010-4-5 16:04:47 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Identicaltwins tend to have similar personalities; if environment outweighs heredity inpersonality development, twins raised together should presumably have moresimilar personalities than those raised apart. A recent study of identicaltwins in both situations measured 11 key traits through a questionnaire, andconcluded that 7 of the 11 are primarily products of heredity.
Whichof the following, if established, would cast the most doubt on the study’sresults?
(A)Fewer than half of the pairs of twins studied were raised separately.

(B)The ages of all of the twins studied fell within a 10-year range.
(C)Some of the traits that the study attributed to heredity developed in theseparately raised twins because those pairs all grew up in similar families.
(D)Although over half the traits measured were determined to be linked toheredity, the nature of those traits varied widely.C
(E)The 11 traits that were measured constitute a representative sample of larger,generally accepted pool of key personality traits
这道题A为什么不对?
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沙发
发表于 2010-4-5 18:33:05 | 只看该作者
A的意思是少于一半的双胞胎是分开养的,那意思就是多余一半的双胞胎是一起养的,然后文中的7/11正好多余一半
我觉得可能这里的A不能削弱题目的结论吧
板凳
发表于 2010-4-5 22:12:34 | 只看该作者
13711的理解似乎有些问题,7/11指的是traits的个数而不是双胞胎的个数。在两种环境下的实验对象个数多少并不影响实验结果,因此A是个无关信息。
地板
发表于 2010-4-6 02:59:58 | 只看该作者
A如果算weaken的话,A非不也算weaken了hehe

不过C选项的这个因果关系很诡异
Some of the traits that the study attributed to heredity developed in theseparately raised twins because those pairs all grew up in similar families.
因为分养的双胞胎被在类似的家庭抚养,所以他们具有一些被算作遗传决定的特征?
5#
发表于 2010-4-6 10:25:00 | 只看该作者
A如果算weaken的话,A非不也算weaken了hehe

不过C选项的这个因果关系很诡异
Some of the traits that the study attributed to heredity developed in theseparately raised twins because those pairs all grew up in similar families.
因为分养的双胞胎被在类似的家庭抚养,所以他们具有一些被算作遗传决定的特征?
-- by 会员 TeamCancer (2010/4/6 2:59:58)



这个study有个假设就是分开抚养的twins就等同于在完全不同的环境下生长,因此traits中非遗传相关的都表现的应该不同。c选项就是从这点削弱,分开抚养时环境可能也类似,从而导致某些非遗传的traits也相似,进而影响结果的准确性。
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