Which of the following would be a control in an experiment testing the prediction that a certain drug prevents cataracts in females over the age of 65?
A) male subjects
B) female subjects younger than 65
C) alternative drugs that are suspected to prevent cataracts
D) female subjects over 65 that are given placebos

Question

Quizplus · Accepted Answer

The control group in this experiment would be female subjects over 65 that are given placebos. This group would allow researchers to compare the effects of the drug being tested to the effects of not receiving any treatment, which is important in determining the effectiveness of the drug. The other answer choices (male subjects, younger female subjects, and alternative drugs) would not be appropriate controls for this particular experiment.

Which of the Following Would Be a Control in an Experiment