To compare a subject with himself or herself under different conditions rather than compare that subject to control subjects, one might choose a(n) _____ design.

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An ABAB design, also known as a reversal design, is used to compare a subject's behavior or condition under different conditions or interventions over time, rather than comparing the subject to others. This design involves an initial baseline period (A), an intervention period (B), a return to baseline (A), and a second intervention period (B), allowing for the observation of changes within the same individual.

To Compare a Subject with Himself or Herself Under Different