- 最后登录
- 2013-8-5
- 在线时间
- 221 小时
- 寄托币
- 522
- 声望
- 68
- 注册时间
- 2009-10-31
- 阅读权限
- 25
- 帖子
- 4
- 精华
- 0
- 积分
- 419
- UID
- 2719924

- 声望
- 68
- 寄托币
- 522
- 注册时间
- 2009-10-31
- 精华
- 0
- 帖子
- 4
|
作业三
ARGUMENT:53
53. [Evidence1] Thirteen years ago, researchers studied a group of 25 infants who showed signs of mild distress when exposed to unfamiliar stimuli such as an unusual odor or a tape recording of an unknown voice. [Evidence1.1] They discovered that these infants were more likely than other infants to have been conceived in early autumn, a time when their mothers' production of melatonin - a hormone known to affect some brain functions-would naturally increase in response to decreased daylight. [Evidence2]In a follow-up study conducted earlier this year, more than half of these children-now teenagers-who had shown signsof distress identified themselves as shy. [Conclusion]Clearly, [C.a] increased levels of melatonin before birth cause shyness during infancy and [C.b] this shyness continues into later life.
首先,调查类错误。样本数量少,只有25人,无法具有代表性。取样方法既不全面也不随机,只观察出现mild distress的个体,(实际应当将所有婴儿作为总体,从此总体中随机抽取一部分,先分为两个对照组,继续观察他们长大后的特征差异)。
即使不考虑实验中的这些错误,我们也不能推断出shyness during infancy continues into later life。首先,结果实验得知正常组只有小部分人认为自己害羞,而实验组则有一半以上人认为自己害羞,是否成立不清楚;其次,infant 的行为是否是shyness值得商榷。
再退一步,即使婴儿期的表现可以看成害羞,并且证实会延续至成年,我们也不能说M导致婴儿的这种害羞行为。M只是对大脑的某些功能产生影响,这并不能说明这些功能改变就成功导致婴儿的害羞行为。
因此,本文错误假定了M对大脑功能的影响激发了害羞,从而错误地得出M的增加导致人害羞
391words time: 2 hours
This article draws a conclusion that increased levels of melatonin before birth cause shyness during infancy which lasts into later life. To justify the conclusion, the author provides a research begun 13 years ago on this subject, which lead to the result that more than half respondents show signs of shyness identified by signs of distress. Yet, I find the evidence dubious and the logic shady in several aspects.
As for the research cited by the author, the samples weren’t scientifically selected, and the procedures were not carefully designed. First, the quantity of the samples is too small. 25 respondents cannot well represent the population, for the variation of each respondent might affect the result. Moreover, randomly sampling in the population is always needed when acquiring a representative sample of the population. The research is based entirely on those infants who showed signs of mild distress when exposed to unfamiliar stimuli. Without comparing the infants above with ordinary infants, the result that shyness in babyhood lasts into later life, is strongly weakened.
Even if we concede that the research is well-designed and we get the true result, it is difficult for us to get to the result that shyness during infancy continues into later life. First reason is that whether the ordinary infants would show shyness just as the infants investigated when grow up is absent. If the infants from different kind share the same rate of shy persons, it is impossible for us to draw any conclusion from this. Moreover, do the signs of mild distress of the infants necessarily mean shyness? If not, the shyness in grow-ups is irrelevant to it.
Even if we assume that all the flaws and problems discussed above are perfectly solved, we still cannot reach the conclusion that increased levels of melatonin is the Pandora Box to the shyness of the infants that affect their later life. As far as we know, Melatonin is a kind of substance known to affect some brain functions, this information cannot directly lead us to the conclusion that if the levels of Melatonin increase, the affected infants will behave distinctive differently from the ordinary ones.
To sum up, the argument is logically flawed, thus unconvincing as it stands. To strengthen the support for the conclusion the author need to provide better evidence, and derive conclusion from it logically.
ISSUE:28
28. "Students should memorize facts only after they have studied the ideas, trends, and concepts that help explain those facts. Students who have learned only facts have learned very little."
学生们在记忆知识的时候应该先学习有助于解释那些知识的理念、潮流和概念。仅仅死学知识的学生是学不到什么东西的。(教育类)
学生们在记忆知识的时候必须重视那些解释知识的理念、潮流和概念的学习。
但是,概念、理念、潮流是抽象的知识,很难把握,如果先学习这些内容,往往无法真正学懂。
更有甚者,这些概念、理念、潮流可能是有争议的,未知的,甚至是错的。
而且我们总是先学到事实,再归纳得到原理,原理是否真的应该在记忆事实之前学习。
对原理理解透彻后,可以归纳以前所学,减少记忆负担。
还可进而预测一些具体的知识现象等。
Words: 433
Almost everyone will agree with the speaker’s assertion that students should study the ideas, trends, and concepts inside of the facts; if not, they will learn little. However, do the students necessarily have to study the ideas, trends, and concepts before they memorize the facts? In my opinion, it is not a necessary but better way to study mechanisms first and then memorize the facts.
Admittedly, to study ideas, trends, and concepts may be boring and difficult for most of the students. Facts are specific things which can be mapped directly in our imagination, while concepts are abstract things indirectly derived from real world. For example, all the stuffs in mathematical books are the most precise concepts and principles derived from real world. They are everything but interesting.
Also, most of these abstract stuffs based on facts are controversial, unknown, or even wrong, which will surely be substituted by newer research. For instance, even when there are only two economists in this world, the debate in economics will last. Almost every concept, trend and idea in economics is marked with disputation.
Furthermore, one must argue that men always learn facts first; unless the facts are summarized, categorized, and generalized, it is impossible for humankind to discover the ideas, trend and concepts derived from them. Actually speaking, everyone learn the fact the sun rises in the morning and set in the evening before knowing why. But what we always do doesn’t necessarily mean what we should always do.
As far as I concern, learning the similar features and relationship among facts help us organize and categorize all the facts we have already known. More importantly, the ideas, trends, and concepts help us predict unknown things.
For examples, people without well-education might accidentally find the sum of three angles of a triangle is Pi; if he/she keep on studying other triangles, if so, he/she will find that the sum the same. However, there are infinite triangles; we cannot study all the triangles and then come to the conclusion that all the triangles have the same property. However, if one is well-educated, it is easy to know the principle that all the triangles possess the foregoing property. Once we know the principle, there is not need for us to memorize the facts. Moreover, we can predict the sum of the three angles of triangles, not matter obtuse or acute they are.
In sum, learning the ideas, trends, and concepts is more important than just memorizing the facts, for facts are limitless and endless to learn, while mechanisms help us organize these facts and predict unknown facts. |
|