Situations Requiring a Between-Subjects Design

According to the general rule of thumb for experimental design choice, under which specific conditions should a researcher prioritize a within-subjects approach?

According to the general rule of thumb for choosing an experimental design, arrange the following decision-making steps in the correct order of logical priority, starting with the default preference.

A cognitive psychologist wants to compare how two different 20-minute exercise routines affect concentration. Each participant is available for only a single 30-minute session. According to the rule of thumb for experimental design choice, the psychologist should implement a within-subjects design.

Analyze the constraints and research goals in each scenario and match them to the most appropriate experimental design and rationale based on the general rule of thumb for design choice.

According to the general rule of thumb for experimental design choice, what should a researcher do if there is insufficient time to test every participant in all experimental conditions?

The general rule of thumb for experimental design choice indicates that a researcher should prioritize a within-subjects design as long as there is enough time for testing and carryover effects are not a serious concern.

A researcher is evaluating a study proposal where participants are available for 90 minutes to test two different 15-minute cognitive tasks. The proposal suggests a between-subjects design. According to the standard rule of thumb for experimental design choice, the researcher should critique this proposal and suggest prioritizing a(n) _____ design instead, given the ample time and lack of serious carryover concerns.

Based on the general rule of thumb for experimental design choice, match each researcher's scenario to the correct design decision.

A cognitive psychologist analyzes their experimental constraints and discovers that exposure to the first condition causes a permanent learning effect. Because this creates a confounding carryover effect that cannot be controlled, the rule of thumb indicates the researcher should consider a _____ design instead.

Arrange the steps a researcher must take to evaluate and finalize their experimental design choice based on the standard rule of thumb, starting with the default preference.