Practice question
Experimental Design

Reversal, multiple-baseline, multielement, and changing-criterion designs: Single-case design selection.

Original BCBA scenario practice question with answer explanation and wrong-choice notes.

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Question

Difficulty: easy. Skill: recognize. Type: experimental design critique.

The team wants stronger evidence before scaling a plan for completing a multi-step job routine. Which design decision best fits reversal, multiple-baseline, multielement, and changing-criterion designs? The case file includes 4 recent sessions, 4 implementers, and 1 setting.

A
Rely on job coach's report alone and stop collecting direct evidence
B
Change the intervention immediately based on the concern alone
C
Continue unchanged and ignore the new contextual information
D
Select the single-case design that can demonstrate control without creating impractical or unsafe conditions in relation to adult client's stopping work after corrective feedback

Correct answer

Explanation

Answer D

The clue is the combination of duration data showing long pauses after feedback, stopping work after corrective feedback, and the required task: Reversal, multiple-baseline, multielement, and changing-criterion designs. The case file includes 4 recent sessions, 4 implementers, and 1 setting. Select the single-case design that can demonstrate control without creating impractical or unsafe conditions in relation to adult client's stopping work after corrective feedback is best because it answers that clue through single-case design selection instead of treating the scenario as a generic behavior problem. On exam items like this, name the decision point first, then eliminate options that rely on one report, a label, a familiar protocol, or an action that skips the relevant data check.

Why this question is hard

Clue
Key scenario clue

The clue is the combination of duration data showing long pauses after feedback, stopping work after corrective feedback, and the required task: Reversal, multiple-baseline, multielement, and changing-criterion designs. The case file includes 4 recent sessions, 4 implementers, and 1 setting.

Trap
Common trap

Stakeholder input matters, but direct data, context, and integrity checks are still needed for a defensible answer.

Next
If you missed it, review Single-case design selection

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Why the other choices are weaker

A
Choice A

Stakeholder input matters, but direct data, context, and integrity checks are still needed for a defensible answer.

B
Choice B

This is weaker because it skips the assessment, integrity, or decision rule needed before changing procedures.

C
Choice C

Ignoring relevant data or context prevents a defensible behavior-analytic decision.

Study tags

Single-case design selectionReversal, multiple-baseline, multielement, and changing-criterion designsreversal designmultiple baseline

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Related study guides

GuideDistractor patternsUse this if the wrong answer sounded plausible.GuideMissed-question reviewUse this if you want to turn the miss into a study rule.GuideScore plateau guideUse this if similar mistakes keep repeating.

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Question FAQ

What BCBA domain does this question cover?

This practice question is tagged to Experimental Design. It also includes study tags for Single-case design selection, Reversal, multiple-baseline, multielement, and changing-criterion designs, reversal design, multiple baseline.

How should I review this practice question?

Answer the scenario before reading the explanation, compare your reasoning with the correct answer, then review why the distractors are weaker.

Is this an official BACB exam question?

No. This is an original study question for BCBA Scenario Tutor and is not an official BACB exam item.

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