What feature of a reversal design primarily increases its internal validity compared to a simpler AB design?

In a reversal design, internal validity is strengthened when the dependent variable reverts to its previous state after the treatment is withdrawn.

A researcher is studying whether a 'standing desk' reduces sedentary behavior in an office worker using a reversal design. Arrange the following steps in the sequence that best demonstrates internal validity by ruling out extraneous variables.

In a single-subject reversal design, researchers analyze data patterns to establish whether an intervention caused a change in behavior. Match each potential experimental observation with the logical analysis of its impact on the study's internal validity.

You are designing a research protocol to determine if a 'mindfulness-reminder' app reduces task errors for a participant. To create a study structure that offers the most robust internal validity by specifically ruling out the possibility that error reduction was caused by a coincidental change in workload or mood, which design should you construct?

Match each term related to single-subject research with the statement that best describes its role in establishing internal validity.

If a behavior does not return to baseline during the withdrawal phase of a reversal design, a researcher evaluating the study's internal validity must consider whether the treatment had a(n) _____ effect or if an extraneous variable was responsible for the initial change.

A clinical psychologist uses a reversal design to evaluate a treatment for anxiety. The patient's anxiety decreases when the treatment is introduced, but remains low after the treatment is withdrawn. True or False: Based on this outcome, the psychologist can confidently rule out extraneous variables and conclude that the treatment caused the reduction in anxiety.

A researcher is analyzing why a reversal design provides stronger internal validity than a simple AB design. They conclude that the reversal design demonstrates control by showing that the dependent variable changes when the treatment is introduced and reverts when it is withdrawn. However, this analytical logic is invalid if the treatment creates a _____ effect.

A researcher wants to evaluate the causal impact of an intervention using a reversal design. Arrange the steps of the experimental process in the logical sequence required to successfully demonstrate internal validity by ruling out extraneous variables.

Explain how the removal of a treatment in a reversal design increases the internal validity of a study compared to a simpler AB design. In your explanation, identify the key behavioral pattern researchers look for and the critical assumption that must be met regarding the treatment's effect.

Based on this scenario, explain how the reversal phase (removing the tactile tool) helps the psychologist establish internal validity, and describe what the psychologist must assume about the tactile tool's effect to justify a causal conclusion.

A clinical researcher wants to evaluate a training program that permanently teaches deep breathing techniques to reduce anxiety using a reversal design. Apply the core assumption of reversal designs to explain why this program is not suitable for this specific research design.