You have been asked to help a top nutrition researcher conduct human experiments on vitamin C. As the subjects walk into the laboratory, you distribute all the vitamin C
pill bottles to the girls and all the placebo pill bottles to the boys. The researcher instantly informs you that there are two errors in your research practice. What steps should you have taken to conduct your experiment correctly?
a. Giving all the boys the vitamin C and the girls the placebo, and telling them what they were getting
b. Distributing the bottles randomly, randomizing the subjects, and telling them what they were getting
c. Telling the subjects which group they were in, but preventing yourself from knowing the contents of the pill bottles
d. Preventing yourself from knowing what is in the pill bottles, and distributing the bottles randomly to the subjects
e. Allowing the subjects to decide whether they take Vitamin C or the placebo, and then giving them the opposite of what they requested
ANS: D
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