Original BCBA scenario practice question with answer explanation and wrong-choice notes.
Difficulty: medium. Skill: apply. Type: experimental design critique.
A BCBA wants to evaluate a handwashing intervention across three school routines. Withdrawing the intervention after improvement would be inappropriate for health reasons. Which design is most suitable?
Correct answer
A multiple-baseline design can demonstrate experimental control by staggering intervention across routines without withdrawing an effective health-related procedure.
An AB design does not provide strong replication of effect.
Withdrawing a useful health routine may be unsafe or inappropriate.
A scatterplot may help detect patterns, but it is not an experimental design.
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