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TOPIC: ARGUMENT53 - 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. 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. In a follow-up study conducted earlier this year, more than half of these children-now teenagers-who had shown signs of distress identified themselves as shy. Clearly, increased levels of melatonin before birth cause shyness during infancy and this shyness continues into later life.
WORDS: 847 TIME: 0:60:00 DATE: 2006-7-20
写得太爽多写了点...超时N多,平时基本都保持600多W40分...
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Attack:
1.质疑13年前study: distress是婴儿本身的么?有对照么?
2.质疑最近study:shyness和distress有关系么?是以前distress那些infants显示了可以察觉的shyness么?
3.即使前2个study正确,M那个东西和shyness有什么关系?(秋天怀孕的那批可能不是后来shy那批; 其他因素影响而非M;异常的秋天)
4.later year能一直影响下去?
思路:
通过1,2的攻击先搭一座桥, distress到shyness, 这样M就可以过桥来影响shyness了.
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Based on two thirteen-year interval studies, the author concludes that the infancy's shyness is caused by the increased levels of melatonin and will continues into its later life. However, this argument is based on two problematic studies and a false reasoning, therefore is unpersuasive as it stands.
First of all, the study conducted thirteen years ago is questionable because it is insufficient to warrant the truth that there is a common distress within this group than the other ones. As we all known, a infant or even a adult is prone to show distress when exposed to unfamiliar stimuli. This is because we all have an inborn tendency to defense the things which might potentially hurt us. Therefore, in this study it possibly is that case. A infant show distress to the unfamiliar stimuli because of its inborn tendency which other infants also have. Even if there is such difference between this group and the others, this might possibly due to the influences of the researchers, since infants are likly to be nervous when facing so many people. Therefore, other groups might probably appear the same distress even if without stimuli. However, the study even fails to tell us how did the other groups behave when exposed to familiar stimuli or just researchers. In all, the study is problematic if without telling the comparison between several different groups.
Moreover, after thirteen years, the following study is still unconvincing to tell us that whether those infants who showed distress before displayed discernable shyness afterwards and that shyness have something to do with the foregoing distress. Firstly, more than half is not clear described to warrant the truth. Is 13 out of 25 more than half? The cardinal number of 25 is too small, therefore, without tell the exact number of the "more than half", any conclusion made on it should be highly dubious. Secondly, can the teenagers clearly identify themselves? Probably not. Moreover, there is not comparison with others too. It is entirely possible those teenagers are so modest, their peers are even shyer than them. Nevertheless, shyness is hard to discern. Even if the research want to discern that, they cannot expect the people who they research to discern themselves, it is not scientific also because they have their own individual criteria to judge whether they are shy or not. Moreover, 13 years long time can change everything, we have no reason to believe the distress they showed before have anything to do with this probable shyness. The environment, such as physical environment, education, family etc, are quite different, and these are in all likelihood to cause or eliminate their shyness. In all, the study afterwards is also unpersuasive as it stands.
Thirdly, even if the two studies are convincible, the group of 25 infants who showed special distress before displayed shyness afterwards. However, the author assumes without justification that there is a causal relationship between the increased levels of melatonin and the shyness the infancy appears thirteen years later. First of all, we have no reason to believe the distress is also shyness, as the author tells in the conclusion that melatonin would cause shyness during infancy. Common sense tells us that we are nervous does not necessarily means we are shy. And it is even impossible to discern whether an infant is shy or not. Secondly, the reasoning that melatonin causes shyness is problematic. We have no reason to believe that the infants conceived in autumn are the teenagers who displayed shyness later, or these two have any relationships. The author does not provide evidence to convince us. It is possible that infants conceived in other seasons showed shyness even more seriously in the end. Therefore, we have no reason to believe melatonin has anything to do with shyness. Moreover, even if infants conceived in autumn exactly showed shyness later, however, it is probably not the results of the melatonin. It could also be the results of the mood of the mother, which could be special in autumn. Even if it is melatonin, there is no reason to believe it is the results of the increased levels of melatonin. It is probably because in that year's autumn, the daylight increased and therefore the melatonin did not increase, since the weather is so changeable. In all, the author's failure to reason that causal relationship renders the conclusion based upon it highly dubious.
Finally, even if the melatonin is the causation of the later shyness, there is still no reasons to believe the shyness will continues into later life. As we all known, shyness is more likely a acquired characteristic, or at lest we can change it through our participation of public activities and delivery of public speech. At all, there is no reason to believe the author's conclusion that melatonin will sentence one to shyness in all one's life and it is not reasonable.
In sum, the argument is unconvincing as it stand. Following up the author's conclusion, the doctor might try to restrain the levels of melatonin by using medicine during pregnancy. However, this might not resolve shyness, moreover, possibly cause other unknowable problems or even illnesses.
[[i] 本帖最后由 undoerlc 于 2006-7-20 11:22 编辑 [/i]] |
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