Which design uses a reversal of the intervention to demonstrate control over behavior?

• A. Reversal
• B. Withdrawal
• C. Changing Criterion
• D. Alternating Treatment

Answer: (A)

Reversal design is centered on turning the intervention on and off to show that the behavior changes are caused by the treatment. When the intervention is withdrawn, the behavior should move toward its baseline level, and then when the intervention is reintroduced, the behavior should change again in the same direction. This back-and-forth demonstrates that the intervention is what’s controlling the behavior, because the changes align precisely with the presence or absence of the treatment. Other designs have different focuses: changing criterion gradually shifts behavior by altering reinforcement requirements, and alternating treatment compares multiple treatments in a rapid sequence rather than reversing a single intervention.