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The arguer cites the results of a study on a group of infants, carried out thirteen years ago, to reach the claim that increased levels of melatonin before birth cause shyness of infancy. Also, he generalized the effect of melatonin to late life according to a follow-up study on the same group of children. If we examine the argument carefully, we would find that the seemingly reasonable conclusion is poorly supported for the arguer commits several logic fallacies in reaching the conclusion.
In the first place, the former study on the group of infants is too poorly conducted to draw any tenable conclusion. For one thing, the total number of 25 infants is too small a sample size to represent the general situation. For another thing, no detailed information on the degree of the distress of the infants in comparison with other groups of infants that are conceived in other time are not mentioned. Lacking the data I request above, we are not able to judge whether the target group of infants showed significantly severe distress to the stimuli.
Also a significant fallacy is the arguer's hasty assertion that the reason for the distress of the infants, if any, is the increase levels of melatonin production of their mother. We are not informed with the specific function of the hormone to the human brain. Furthermore, whether melatonin would affect mothers' brain or the infants' brain are not clearly explored. The concurrence of the increased level of melatonin of the mothers and the pregnancy of the infants, itself, are far from rooted evidence to establish the cause and effect relationship between the two.
Before I come to my final conclusion, I would like to point out that the tracking study upon which the author deduces the effect of melatonin into later life is also ungrounded. The arguer overlooks the postnatal factors that could, to be sure, influence people's character and may serve as the real cause of the teenagers. Among theses factors are the growing environment, stress from earlier education and pressures from their parents. Without ruling out all the possible causes to the responded shyness of the group, the arguer’s allegation that the shyness of the infants continues to their later life is unconvincing.
In conclusion, the argument lacks credulity because the arguer provides no substantiated evidence to verify the distress of the group and to support the connection between melatonin and the distress. To strengthen the argument, the arguer needs to provide detailed data concerning about the degree of the distress and shyness of the group. Also, other possible causes of the claimed distress are required to be ruled out.
总体来说,是一片很好的文章,特别是提到了对比试验
但是如果能在对比试验,那加一些影响的细节,以及后面的例子稍微写一点细节或许会更好
这只是一点建议
拍的不好别打我哦,
希望大家很很的来拍我的:) |
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