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An ancient, traditional remedy for insomnia—the scent of 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 electronically. During the first week, volunteers continued to take their usual sleeping medication. They slept soundly but wakened feeling tired. At the beginning of the second week, the volunteers discontinued their sleeping medication. During that week, 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. Therefore, the study proves that lavender cures insomnia within a short period of time.
Write a response in which you discuss what specific evidence is needed to evaluate the argument and explain how the evidence would weaken or strengthen the argument.
In this argument, the arguer concludes that the traditional remedy for insomnia is effective. To strengthen this conclusion, the arguer provides a recent study about 30 volunteers who are tested by three kinds of methods to cure insomnia and he or she thinks that the consequence of experiment is positive. At the first glance, the study cited by the arguer might be somewhat reasonable, but close scrutiny reveals that it contains several unconvincing assumptions and is therefore unpersuasive.
First of all, the study introduced in the argument is not a successful one; we can’t conclude that the reason why volunteers slept more soundly is the scent of lavender in the third weeks. Because these people have taken their usual sleeping medication for one week before, maybe the concentration of the medication come to an excellent time or perhaps these medications cure the insomnia within a short period of time so that the testees slept better in the third week. Without eliminating the influence of the medication, I cannot accept the arguer’s point of view that lavender can cure insomnia.
Second, even assuming that the influence of the medication they have taken before has absolutely disappeared, the experiment is still supposed to be unsuccessful because the arguer haven’t told us what have the volunteers done when they were tested in those three weeks. Maybe they are required to slept at the first two weeks so that they couldn’t slept soundly or feel tired after sleeping, which can easily understand by our common knowledge. And it is possible that the volunteers are asked to do exercise for a long time during the daytime in the third week; and because of this, people feel more tired than before so that they can sleep more soundly and longer. For that matter, we cannot achieve the answer that the pillows with the smell of lavender do cure the insomnia in these three weeks.
Finally, even I concede that the volunteers slept longer and more soundly than in the previous two weeks because their insomnia is cured by the scent of lavender, the number of study’s volunteers is too small so that the result of experiment is not credible. As a common knowledge, the reason why people suffer from insomnia is multitudinous, such as tension, physical illness, or mental illness, so that just test the therapy on 30 volunteers cannot come to the conclusion that this method is efficient. Besides that, even if the number of testees is enough, the experimenters intend to examine if the scent of lavender will cure insomnia, he or she should set two groups of people, one is group experimented on and the other is control. Without a rational experiment, we cannot accept the consequence of a study which serves as a proof.
To sum up, the arguer’s conclusion about efficiency of the traditional treatment to insomnia is not well supported as it stands. The author must develop the study so that it can be used as a proof to support the idea of author. |
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