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Examples of Between-Subjects Experiments
Examples of between-subjects experiments include randomly assigning a sample of university students to either a traumatic writing condition or a neutral writing condition, ensuring each student only completes one type of task. Similarly, a study evaluating treatments for severe agoraphobia might divide participants into separate groups so that each person receives only one of three possible therapies.
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Research Methods in Psychology - 4th American Edition @ KPU
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Advantages of Between-Subjects Experiments
Independent-Samples t-Test
One-Way ANOVA
Within-Subjects Experiment
Matched-Groups Design
Examples of Between-Subjects Experiments
Example of Lack of Context in Between-Subjects Designs
Combining Between-Subjects and Within-Subjects Designs
Equivalent Groups
Nonequivalent Groups
Which of the following best describes a between-subjects experiment?
In a between-subjects experiment, researchers test each participant across every level of the independent variable to directly compare their individual responses.
A researcher is conducting a between-subjects experiment to test if '8 hours of sleep' versus '4 hours of sleep' affects cognitive performance on a memory task. Arrange the steps of this specific study in the correct chronological order.
A researcher investigates whether a new font improves reading speed. They assign 50 participants to read a text in 'Times New Roman' and another 50 participants to read the same text in 'OpenDyslexic'. Match each aspect of this study to the structural logic of a between-subjects experiment.
You are tasked with creating a research protocol to investigate whether a 'Gamified' exercise app increases user motivation more than a 'Standard' exercise app. To avoid 'carryover effects'—where the experience with one version of the app might influence the user's perception or performance with the other—you decide to implement a between-subjects experiment. Which of the following plans should you develop to successfully fulfill this design requirement?
A researcher is evaluating whether to use a within-subjects or a between-subjects design for a study on a permanent educational intervention. They determine that a(n) _____ design is the only valid choice because the intervention results in an irreversible change, making it impossible for the same participants to serve in both the experimental and control conditions.
An experimental design in which each participant is exposed to only a single level of the independent variable is called a(n) _____ experiment.
A clinical researcher measures each participant's stress level at three time points: before a mindfulness program begins (Week 0), after four weeks of training (Week 4), and after eight weeks of training (Week 8). Every participant completes the same single program. The researcher argues that this is a between-subjects design because each participant is assigned to only one program. This argument is correct.
A researcher studies whether type of reward (monetary payment, verbal praise, or no reward) affects how long elementary school children persist on a difficult puzzle. One group receives money after each puzzle attempt, a second group receives verbal praise, and a third receives nothing. No child participates in more than one condition. Match each term to the description that correctly identifies its role in this study.
A research team wants to test whether a new anti-anxiety drug (Drug A), an established drug (Drug B), or a placebo reduces self-reported anxiety in adults with generalized anxiety disorder. They must design the study and analyze the data responsibly. Arrange the following decisions and actions in the order that best reflects sound research practice for a between-subjects experiment.
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Which of the following scenarios best exemplifies a between-subjects experiment?
In a between-subjects experiment investigating three separate treatments for agoraphobia, a participant who is randomly assigned to the first treatment group will also be asked to complete the other two treatments to see which one is most effective for them.
A researcher is designing a between-subjects experiment to compare the effects of 'traumatic writing' versus 'neutral writing' on student well-being. Arrange the following steps in the correct order to implement this specific study design.
Analyze the research examples involving university writing tasks and agoraphobia treatments. Match each specific experimental feature to the methodological role it plays in a between-subjects design.
A researcher is developing a new between-subjects experiment to test if 'natural sunlight' in a workspace improves employee productivity compared to 'fluorescent lighting.' Which of the following procedural structures should the researcher build to ensure the study is a valid between-subjects design?
In the example of a between-subjects experiment involving university students, researchers compare a traumatic writing condition with a(n) _____ writing condition so that each participant completes only one type of task.
To evaluate the rigor of a between-subjects experiment comparing three therapies for agoraphobia, a researcher must verify that participants were _____ to their groups to ensure that any differences in outcomes are caused by the treatments rather than pre-existing participant traits.
A researcher studying the effect of background noise on reading comprehension randomly assigns 50 undergraduate students to read a passage in either a noisy environment or a quiet environment, with no student completing both conditions. This study matches the defining structure of a between-subjects experiment, as illustrated by the traumatic/neutral writing and agoraphobia treatment examples.
Analyze each specific design feature drawn from the between-subjects experiment examples (traumatic/neutral writing study and agoraphobia treatment study). Match each feature to the methodological threat it is specifically designed to prevent.
A peer reviewer is judging whether a proposed study—in which participants are assigned to separate groups receiving different writing tasks or different therapies—qualifies as a rigorous between-subjects experiment. Arrange the following evaluative criteria in the logically correct order, from the most foundational check to the final overall judgment of rigor.