. One hundred volunteers who suffer from agoraphobia are available for a study.
ID: 3294255 • Letter: #
Question
. One hundred volunteers who suffer from agoraphobia are available for a study. Fifty are selected at random and are given the drug imipramine, which is believed to be effective in treating agoraphobia. The other 50 are given a placebo. A psychiatrist evaluates the symptoms of all volunteers after two months to determine if there has been substantial improvement in the severity of the symptoms. This study would be double blind if a. neither drug had any identifying marks on it. b. Neither the volunteers nor the psychiatrist were allowed to see each other during the session during which the psychiatrist evaluated the severity of the symptoms. c. neither the volunteers nor the psychiatrist knew which subjects had received the placebo. d. all of the above.
Explanation / Answer
A double blind study is one in which neither the patients (called subjects) nor the experimenter or assessor the results knows which treatment is administered to a subject.
This study is designed to remove any prejudgmental bias
Correct answer is Option-C
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