A criticism of using a wait-list control group as a means from which to assess the effectiveness of a treatment is problematic because people in the control group:
A) probably have different levels of motivation than people who actively signed up to receive the treatment.
B) may show natural improvement and are thus a poor comparison.
C) typically have less severe symptoms than people selected to receive the treatment.
D) do not receive nonspecific treatment effects.
Correct Answer:
Verified
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