The case of Caitlin, used in the text, demonstrated that the psychologist's intervention for trichotillomania was effective when applied in an ABAB reversal design. In this case, what signaled the success of the intervention?

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In an ABAB reversal design, the effectiveness of an intervention is demonstrated by a decrease in the targeted behavior during the B (intervention) phases. Caitlin's case showed success when there was a decrease in her trichotillomania behavior during the B phases where the intervention was applied.

The Case of Caitlin, Used in the Text, Demonstrated That