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发表于 2009-8-23 22:08:31
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TOPIC: ARGUMENT167 - A folk remedy* for insomnia, the scent in lavender flowers, has now been proved effective. In a recent study, 30 volunteers with chronic insomnia slept each night for three weeks on lavender-scented pillows in a controlled room where their sleep was monitored. During the first week, volunteers continued to take their usual sleeping medication. They slept soundly but wakened feeling tired. During the second week, the volunteers discontinued their medication. As a result, they slept less soundly than the previous week and felt even more tired. During the third week, the volunteers slept longer and more soundly than in the previous two weeks. This shows that over a short period of time lavender cures insomnia.
*A folk remedy is usually a plant-based form of treatment common to traditional forms of medicine, ones that developed before the advent of modern medical services and technology.
WORDS: 417 TIME: 00:29:15 DATE: 2009/8/23 11:21:17
In this argument, the author claims that the scent in lavender flowers could effectively cures insomnia. To back up this claim, he cite a recent study, in which 30 volunteers spent three weeks sleeping on lavender-scented pillows. Careful examination of this evidence, however, reveals that it lends little credible support to the author's conclusion. Reasons are stated as follows.
In the first place, the reliability of the study is open to doubt, considering its quantity. The number of participants involved in the study, 30, seems to constitute such a small group that their responses to the scent may not be representative. Insomnia is as one of the most commonly got ailment. From the research conducted by the hospitals, which indicates that with the increasing pressure and burden on people, there should be thousands of people for suffered insomnia, it is reasonable to doubt that the 30 volunteers' reports cannot reflect the general responses to the lavender scent. Unless the study is re-conducted involving more participants, I will remain doubtful about the typicalness of result.
In the second place, the study is conducted without a control group or contrast experiment. To be specific, the author supply no information about the volunteers'feeling when they sleep on the non-scented pillows. Lacking such evidence, perhaps the volunteers' feeling may still be alleviated in the last week because the dependency of medicine they had gradually developed has disappeared according to the medical research. To reach the cited conclusion, the study should be conducted in more controlled environment to convince me about the actual influence of the scent.
In the third place, the author's conclusion about the effectiveness of the scent rests on the assumption that all the factors except taking sleeping medicine remains constant during these three weeks. Nonetheless, the assumption is a weak one, since the author fails to provide evidence to confirm it. It is entirely possible that in the first two weeks, the volunteers took more strenuous exercise and worked even harder than they did in the last week. For that matter, the tiredness and sleeping may not be affected by the scent. Without accounting for this possibility, the author cannot confidently draw any conclusion about the benefit of the scent in lavender.
To sum up, the argument is not based on valid evidence or sound reasoning, neither of which is dispensable for a conclusive argument. In order to draw a better conclusion, the author should reason more convincingly, cite more persuasive evidence, and take every possibility into consideration. |
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