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The reversal design has two potential problems related to the removal of treatment. First, removing a treatment that is working can be unethical, such as taking away an intervention that reduces self-injury. Second, the dependent variable may not return to baseline once the treatment is removed, making it difficult to determine whether the treatment caused the change or if another factor was responsible.

Limitations of Reversal Design

A single-subject research design developed to address the ethical and practical limitations of the reversal design. In a multiple-baseline design, baselines are established for multiple participants, behaviors, or settings, and the treatment is introduced at a different time for each. This design demonstrates the effect of a treatment without requiring its removal.

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