A psychiatrist is testing a drug that treats depression.He has given the drug to all his patients and all of them have experienced a decrease in depressive symptoms.Although this is interesting,his experience is limited because he does not have a:
A)Reliable way to measure depressive symptoms
B)Comparison group that did not receive the drug
C)Hypothesis
D)Psychotherapy to supplement the drug

Question

Quizplus · Accepted Answer

Without a comparison group that did not receive the drug, it is impossible to determine whether the drug is truly responsible for the decrease in depressive symptoms. Other factors may be at play, such as a placebo effect or simply the passage of time. A control group is necessary to establish the drug's effectiveness.

A Psychiatrist Is Testing a Drug That Treats Depression