The major difference between the ABA design and the observation-treatment-observation design is that the former design permits a return to baseline.

Question

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The ABA design includes three phases: baseline (A), intervention (B), and then a return to baseline (A), allowing for observation of changes when the intervention is withdrawn, unlike the observation-treatment-observation design which does not explicitly include a return to baseline phase.

The Major Difference Between the ABA Design and the Observation-Treatment-Observation