Disadvantages of ABAB Design

Arrange the phases of an ABAB design in the correct chronological order.

ABAB Reversal Design Example

Arrange the phases of an ABAB research design in their correct chronological order.

A researcher uses an ABAB design to test whether a relaxation technique reduces anxiety in a client. During the first treatment phase, the client's anxiety decreases. When the treatment is temporarily removed, anxiety increases again. The treatment is then reintroduced and anxiety decreases once more. What is the primary reason the researcher includes the final treatment phase rather than ending the study after the return-to-baseline phase?

A school psychologist wants to study whether verbal praise increases a student's homework completion rate. She records the student's baseline completion rate for two weeks (Phase A), then provides daily verbal praise for three weeks (Phase B), then withdraws the praise for two weeks and observes that completion rates drop back toward baseline (Phase A). She concludes that her study is now complete because she has successfully demonstrated that the behavior changed with treatment and reversed without it. This study qualifies as a fully implemented ABAB design.

A researcher uses the single-subject design shown in the image to study a student's off-task behavior. Match each phase of this study with its specific analytical role in establishing a cause-and-effect relationship between the praise and the behavior change.

Based on the structural phases illustrated in the image, imagine you are tasked with creating a new research protocol to test the impact of 'verbal reminders' on 'safety belt usage' in a single driver. Which of the following experimental plans would you construct to properly implement an ABAB design and demonstrate a functional relationship?

In an $ABAB$ design, the letter $A$ represents the treatment phase, and the letter $B$ represents the baseline phase.

In a single-subject research design, match each phase of an $ABAB$ design with its primary conceptual role in demonstrating a functional relationship.

A clinical researcher is deciding whether to use an ABAB design to evaluate the effectiveness of a behavioral intervention for a child who engages in dangerous self-injurious behavior. While the design would provide strong causal evidence—because the behavior should change predictably each time the treatment is introduced or removed across all four phases—the researcher must weigh this scientific benefit against a serious _____ concern raised by requiring the temporary withdrawal of a potentially effective treatment during the second baseline phase.

In an ABAB design, the final reintroduction of the treatment phase is considered critical for evaluating internal validity because it provides _____ of the initial treatment effect, allowing the researcher to conclude that the behavior change was caused by the intervention rather than a coincidental extraneous variable.

Describe the structure of an $ABAB$ design, detailing each phase in chronological order and explaining what each phase represents in this single-subject design.

Based on the structural design of an $ABAB$ study, explain how the student's studying behavior is expected to change during each phase when positive attention is introduced, removed, and then reintroduced. Explain what these changes indicate about the effect of positive attention.

If you are applying an $ABAB$ design to evaluate a new behavior intervention, what specific action must you take during the transition from the second phase to the third phase, and why is this transition necessary according to the design's reversal structure?