What does the sequence of a reversal design typically involve?

In a reversal design, the typical sequence follows a specific pattern that allows for the examination of the effects of a treatment on a behavior. The correct response reflects this sequence, which starts with a baseline measurement, followed by the introduction of a treatment phase, then a reversal to a no-treatment or baseline phase, and often concludes with a return to the treatment phase. This design effectively demonstrates whether the treatment produced a change in behavior by comparing the periods of treatment with the non-treatment phases, thus providing valuable insight into the causal relationship.

The structure of this design is beneficial for establishing the effectiveness of an intervention, as the behavior is monitored at various points, allowing for the observation of changes that coincide with the treatment phases. This clear delineation helps in establishing the treatment's impact while also providing a means to assess the stability of the behavior during the baseline and the potential for change when the treatment is applied or removed.

Other options do not accurately represent the sequence of a reversal design. For instance, a single treatment without a baseline would lack the necessary comparison points to assess the treatment's effectiveness. The concept of multiple baselines pertains to a design where different behaviors or subjects are monitored at different times, rather than within the same treatment context. Random assignment is characteristic of