Outline:
1.The survey’s result lacks credibility.
2.The arguer fails to establish a casual relationship between increased levels of melatonin and signs of mild stress in the infants.
3.The arguer fails to rule out other factors that might have caused shyness in the surveyed infants.
In this argument, the arguer claims that it is increased levels of melatonin that cause shyness during infancy and this shyness continues into later life. To support this argument, the arguer cites a study of 25 infants,concieved in early autumn when their mother's production of melatonin increase, who showed signs of distress when exposed to some stimuli.Also,the arguer asserts that a follow-up study showed that half of these children still identify themselves as shy when they are teenagers. This argument, however, is logically flawed in several critical aspects.
In the first place, the arguer fails to assure me that the survey’s result is credible. The number of the infant,25,is perhaps so small that it is entirely possible that many other infants who are conceived also in early autumn do not show any signs of distress.Besides,the arguer fails to rule out other possible factor that could have influenced the mental condition of the infants. The devices of the hospital or whether the infant is taken good care of can also have an impact on the infants' health conditions. Lacking such detail infomation, the survey supports little to the arguer's conclusion.
Another problem with this argument would be the unwarranted relationship between the shyness and the level of melatonin that the author claims in the argument. The arguer shows nothing about the effectiveness of the melatonin and no evidence is provided to explain the impact that the melatonin will have on the infants. It is entirely possible that the melatonin has nothing to do with the distress but other hormone or a certain kind of DNA would be the true reason.Therefore, lacking enough information about the melatonin, the arguer fails to convince me that it is the melatonin that leads to the shyness of the infants.
Finally, the arguer unfairly assumes that this shyness will continue into later life. The follow-up study about the teenagers cited by the arguer does not necessarily indicate that the surveyed teenagers’ shyness originated from the early time when they were still babies since no information about the growing conditions of these teenagers was provided. It is entirely possible that the growing environment or something happened in their life, for example, the divorce of their parents, results in their shyness. Thus, without ruling out such possibilities, whether the shyness will continue into later life is open to doubt.
All in all, the argument is not persuasive. To strength it, the arguer should show a more reliable study and provide us the detail information of the melatonin.Besides, the arguer should also rule out other factors that would also influence the shyness of the teenagers.
In this argument, the arguer claims that it is increased levels of melatonin that cause shyness during infancy and this shyness continues into later life. To support this argument, the arguer cites a study of 25 infants,concieved in early autumn when their mother's production of melatonin increase, who showed signs of distress when exposed to some stimuli.Also,the arguer asserts that a follow-up study showed that half of these children still identify themselves as shy when they are teenagers. This argument, however, is logically flawed in several critical aspects.
In the first place, the arguer fails to assure me that the survey’s result is credible. The number of the infant,25,is perhaps so small that it is entirely possible that many other infants who are conceived also in early autumn do not show any signs of distress.Besides,the arguer fails to rule out other possible factor that could have influenced the mental condition of the infants. The devices of the hospital or whether the infant is taken good care of can also have an impact on the infants' health conditions. Lacking such detail(ed) infomation, the survey supports little to the arguer's conclusion.
Another problem with this argument would be the unwarranted relationship between the shyness and the level of melatonin that the author claims in the argument. The arguer shows nothing about the effectiveness of the melatonin and no evidence is provided to explain the impact that the melatonin will have on the infants. It is entirely possible that the melatonin has nothing to do with the distress but other hormone or a certain kind of DNA would be the true reason(说baby和mother特殊性比较好,它的一般对脑功能应该是已知默认的).Therefore, lacking enough information about the melatonin, the arguer fails to convince me that it is the melatonin that leads to the shyness of the infants
Finally, the arguer unfairly assumes that this shyness will continue into later life. The follow-up study about the teenagers cited by the arguer does not necessarily indicate that the surveyed teenagers’ shyness originated from the early time when they were still babies since no information about the growing conditions of these teenagers was provided. It is entirely possible that the growing environment or something happened in their life, for example, the divorce of their parents, results in their shyness. Thus, without ruling out such possibilities, whether the shyness will continue into later life is open to doubt.
All in all, the argument is not persuasive. To strength(en) it, the arguer should show a more reliable study and provide us the detail information of the melatonin.Besides, the arguer should also rule out other factors that would also influence the shyness of the teenagers.