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Limitations of Reversal Design
The reversal design has two potential problems related to the removal of treatment. First, removing a treatment that is working can be unethical, such as taking away an intervention that reduces self-injury. Second, the dependent variable may not return to baseline once the treatment is removed, making it difficult to determine whether the treatment caused the change or if another factor was responsible.
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Research Methods in Psychology - 4th American Edition @ KPU
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Baseline Phase
Treatment Phase
Internal Validity of Reversal Designs
Multiple-Treatment Reversal Design
Alternating Treatments Design
ABAB Design
Internal Validity in Reversal Designs
ABAB Reversal Design Example
Limitations of Reversal Design
Arrange the phases of a fundamental reversal design (ABA design) in the correct chronological order.
In a research study using a reversal design (ABA), what is the primary scientific purpose of withdrawing the treatment and returning to the baseline condition in the final phase?
A researcher is investigating the effectiveness of a 'gold star' reward system on a student's on-task behavior using a reversal design. Match each specific step of the study to its corresponding phase label in the ABA model.
In a single-subject reversal design (ABA), if a researcher observes that the target behavior does not return to baseline levels after the treatment is withdrawn, they can still definitively conclude that the treatment was the primary cause of the initial change.
When evaluating the appropriateness of a reversal (ABA) design for a specific study, a researcher must ensure that the target behavior is ______; if the behavior will not return to baseline levels once the treatment is removed, the design cannot effectively demonstrate experimental control.
Which of the following alternative names is commonly used to refer to the reversal design, the most fundamental single-subject research design?
In a single-subject reversal (ABA) design, the 'reversal' in the final phase is achieved by introducing an opposite treatment to actively force the behavior back to its baseline state.
A clinical psychologist is evaluating a new deep-breathing exercise to reduce a patient's daily anxiety attacks. Match each proposed action in the study to its corresponding phase within a standard ABA reversal design.
In a research study utilizing a single-subject ABA design, the researcher withdraws the treatment in the third phase specifically to return the participant to the _____, thereby analyzing whether the treatment was the actual cause of any behavioral change.
An educational researcher is evaluating the causal impact of a peer-tutoring program on a student's spelling accuracy using a reversal design. Arrange the steps of the study in the correct chronological order to assess the treatment's effectiveness.
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Multiple-Baseline Design
What are the two potential problems associated with the removal of treatment in a reversal design?
A researcher is evaluating a new mnemonic device to help a student learn vocabulary. After the treatment phase, the student's memory performance remains high even during the withdrawal phase, failing to return to the original levels. True or False: In this scenario, the researcher can still definitively conclude that the mnemonic device was the cause of the improvement because the student's skills stayed better than they were at the start.
A researcher is evaluating a study where a successful behavior intervention was withdrawn, but the participant's behavior did not return to its original state. Arrange the steps in the logical order required to analyze why this specific outcome limits the study's conclusions.
True or False: A major limitation of the reversal design is that once a treatment is removed, the participant's behavior may not return to baseline levels, making it difficult to determine if the treatment was the actual cause of the change.
In a single-case experimental design that uses a reversal () design, a researcher observes that a participant's behavior does not return to baseline levels after the treatment is withdrawn. Why does this failure to return to baseline present a primary limitation for the study's conclusions?
In a reversal design, researchers transition from a treatment phase back to a baseline phase to establish that the treatment caused the observed change. Match each limitation of the reversal design with the research scenario that best illustrates it.
When a researcher chooses not to withdraw a successful treatment for self-injury in a reversal design because doing so would be unethical, the resulting causal evidence is considered _____, since the study can no longer rule out external factors as the cause of improvement.
Match each hypothetical single-subject research scenario with the specific limitation of the reversal design it demonstrates.
A researcher evaluates a social-skills intervention using a reversal design. After withdrawing the intervention, the participant's positive behavior remains high. Because the dependent variable does not return to baseline, the researcher cannot rule out alternative explanations (such as the participant making new friends), meaning this study suffers from a major threat to _____ validity.
A researcher is planning a single-subject study to test a new anxiety-reduction program. Order the steps the researcher should take to evaluate whether a reversal design is ethically and methodologically appropriate.
Describe the two primary limitations associated with the removal of treatment in a reversal design, as discussed in the context of single-subject research designs.
Based on the limitations of reversal designs, explain why the researcher should NOT withdraw the treatment in this scenario, and describe the methodological challenge they would face if they did withdraw the treatment but the patient's self-injurious behavior remained low.
A researcher implements a new reading intervention for a student using a reversal design. After the intervention is removed, the student's reading comprehension scores remain high. Apply the concepts of reversal design limitations to explain why this result prevents the researcher from claiming the intervention caused the improvement.