An effective treatment is identified in an ABAB (reversal)design when
A) behavior after the intervention is at the same level as the baseline in both the first and second AB stages.
B) behavior after the intervention is different from the baseline in the first AB stage, but not in the second AB stage.
C) behavior after the intervention is different from the baseline in the second AB stage, but not in the first AB stage.
D) behavior after the intervention is different from the baseline in both the first and the second AB stages.

Question

Quizplus · Accepted Answer

An effective treatment should result in behavior that is consistently different from the baseline. This means that there should be a clear and significant change in behavior after the intervention that is observed in both AB phases. Option D states that behavior is different from the baseline in both AB stages, indicating that the treatment is effective. Options A, B, and C do not meet this criterion as they describe behaviors that are either consistent with the baseline or only different from the baseline in one of the AB stages.

An Effective Treatment Is Identified in an ABAB (Reversal)design When