When Experiments Are Used to Determine Whether Therapy Is Effective

question 416

Multiple Choice

When experiments are used to determine whether therapy is effective,

• A)it is not unusual for the control group to show some improvement, even without receiving therapy.
• B)the therapy can be deemed effective only if the experimental group shows more improvement than the control group.
• C)a waiting-list control group is used since it would be unethical to withhold treatment from someone who really needs therapy.
• D)all of these can occur.

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