Question: 15.33 Informed consent. The requirement that human sub jects give their informed consent to participate in an experi ment can greatly reduce the number of

15.33 Informed consent. The requirement that human sub jects give their informed consent to participate in an experi ment can greatly reduce the number of available subjects. For example, a study of new teaching methods asks the consent of parents for their children to be taught by either a new method or the standard method. Many parents do not return the forms, so their children must continue to follow the standard curricu lum. Why is it not correct to consider these children as part of the control group along with childreia who are randomly as signed to the standard method?

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