Maria has been asked to be a subject in a study to determine if additional vitamin A will promote the growth of healthy, strong fingernails Since she wants the study to be as close to the "ideal" nutrition intervention study as possible, she will want to be sure that:
A)only the researcher knows which participants receive vitamin A.
B)all of the participants are between 18 and 25 years of age.
C)her chances of getting vitamin A are better than those of anyone else.
D)half of the participants get something that looks like additional vitamin A but isn't.

Question

Quizplus · Accepted Answer

Maria wants to ensure that the study is as close to an ideal nutrition intervention study as possible, which would involve a randomized, double-blind, placebo-controlled design. This means that participants would be randomly assigned to either receive the actual vitamin A or a placebo (something that looks like the treatment but doesn't actually contain the active ingredient). Additionally, neither the researcher nor the participants should know who is receiving the treatment or the placebo to avoid bias in the results. Therefore, choice D is the best option as it describes a double-blind, placebo-controlled design.

Maria Has Been Asked to Be a Subject in a Study