A study of high blood pressure treatments found that certain meditation techniques and the most commonly prescribed drugs are equally effective if the selected treatment is followed as directed over the long term. Half the patients given drugs soon stop taking them regularly, whereas eighty percent of the study's participants who were taught meditation techniques were still regularly using them five years later. Therefore, the meditation treatment is the one likely to produce the best results.
Which of the following, if true, most seriously weakens the argument?
People who have high blood pressure are usually advised by their physicians to make changes in diet that have been found in many cases to reduce the severity of the condition.
The participants in the study were selected in part on the basis of their willingness to use meditation techniques.
Meditation techniques can reduce the blood pressure of people who do not suffer from high blood pressure.
Some of the participants in the study whose high blood pressure was controlled through meditation techniques were physicians.
Many people with dangerously high blood pressure are unaware of their condition.
此题的重点在于,文中说meditation和prescribed drugs是在长期使用的情况下,效果是一样的;且用数据证明,meditation的参与者有80%都是会在五年内继续坚持,而50%吃药的人总是有规律地停止,长期内肯定冥想效果好;但是B项削弱了其结论,因为如果参与者都是自身愿意使用冥想的话,说明80%的数据不可靠,可能正好是那些主动使用冥想的人参与实验,而实际情况是,大部分用冥想的人的willingness是不强的,故不会坚持
登录 或 注册 后可以参加讨论