Example of Time Constraints in Between-Subjects Designs

Example of Long-Term Change in Between-Subjects Designs

Under which of the following conditions does a between-subjects design become strictly necessary?

When an experimental treatment is intended to produce a permanent behavioral change, researchers must use a between-subjects design rather than a within-subjects design.

Match each research scenario below with the primary reason why a between-subjects design is strictly required rather than a within-subjects design.

A researcher is testing a specialized training program that permanently enhances a person's ability to recognize micro-expressions. Arrange the following steps to logically demonstrate why a between-subjects design is required for this experiment.

A researcher is designing a proposal for a study to test a new therapy that permanently reduces social anxiety. Given a $1,500 budget for a single $6$-hour laboratory rental to test $24$ participants, which of the following research plans correctly constructs a valid design that integrates both the nature of the therapy and the logistical constraints?

A between-subjects design becomes strictly necessary when severe _____ constraints make it unfeasible to test each individual in all experimental conditions.

A researcher evaluates a claim that a within-subjects design is suitable for testing a clinical treatment meant to produce long-term behavioral changes. They reject this claim, noting that the design is invalid because the intervention's _____ makes it impossible for participants to return to their baseline state for subsequent testing in a control condition.

A researcher is studying shoppers waiting in a fast-moving checkout line where each individual is only available for 2 minutes. The study compares two cognitive tasks, each requiring 1.5 minutes to explain and complete. To test the effects of both tasks under these conditions, the researcher must apply a between-subjects design rather than a within-subjects design.

Analyze the following research scenarios and match each with the correct methodological limitation or feasibility status that determines whether a between-subjects design is strictly necessary.

A researcher is deciding between a within-subjects and a between-subjects design. Order the steps they should take to evaluate the feasibility of a within-subjects design and determine if a between-subjects design is strictly necessary.