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Elimination of Directionality Problem in Quasi-Experiments
In quasi-experimental research, researchers manipulate an independent variable prior to measuring the dependent variable. This chronological sequence effectively resolves the directionality problem—a common issue in purely non-experimental studies—because the established timeline clarifies which variable is the potential cause and which is the effect.
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Research Methods in Psychology - 4th American Edition @ KPU
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Elimination of Directionality Problem in Quasi-Experiments
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Causal Limitations of Quasi-Experimental Research
Which of the following is a key characteristic that distinguishes quasi-experimental research from a true experiment?
Match each feature of a quasi-experimental design with the specific role it plays or the consequence it has on the quality of a psychological research study.
A clinical psychologist evaluates the effectiveness of a new mindfulness-based therapy by providing the treatment to all patients at one clinic while patients at a neighboring clinic receive standard care. Because the researcher is manipulating the treatment but is using pre-existing groups rather than assigning individual patients to conditions by chance, this study is best categorized as a(n) _________ research design.
A psychologist is testing the impact of a new peer-mentoring program in a local high school. Arrange the logical sequence of steps the psychologist would take to conduct a study that follows a quasi-experimental design and evaluates the strength of its causal claims.
A researcher claims that their quasi-experimental study provides the same level of confidence in causal conclusions as a true experiment because both designs involve the manipulation of an independent variable. This evaluative claim is scientifically sound.
Although quasi-experimental research offers more control than purely correlational studies, it generally possesses lower internal validity than a true experiment because it lacks random assignment or counterbalancing.
A researcher evaluates a new educational software by implementing it in one classroom and comparing the results to another classroom that continues with the standard curriculum. Which statement best explains why this quasi-experimental design has lower internal validity than a true experiment, yet still provides more control than a purely correlational study?
A psychology instructor asks students to match scenarios with their corresponding design feature. Match each research description to the quasi-experimental design feature or consequence it applies.
An investigator is analyzing the methodological differences between two research proposals. Study A uses random assignment and counterbalancing, whereas Study B implements a comparison condition using pre-existing groups without random assignment. In analyzing their quality, the investigator concludes that Study B generally possesses lower _____ than Study A.
Evaluate the following research design scenarios based on the standard of internal validity and control established in methodology. Arrange them in order from the design that provides the HIGHEST level of internal validity to the design that provides the LOWEST level of internal validity.
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In quasi-experimental research, how does the study design effectively resolve the directionality problem?
Arrange the following steps of a quasi-experimental study in the correct chronological order to demonstrate how the design eliminates the directionality problem.
A clinical psychologist introduces a new daily journaling intervention at a residential treatment center and then measures the residents' self-reported anxiety levels one month later. In this quasi-experimental design, the directionality problem is effectively eliminated because the intervention was introduced before the anxiety levels were measured.
Analyze the following research scenario: A clinical psychologist introduces a gratitude-journaling intervention to patients in May and measures their depressive symptoms in August. Match each element of the study with its specific logical role in resolving the directionality problem.
Match each research term with its specific role in how quasi-experiments resolve the directionality problem.
Which of the following best explains the logical advantage of a quasi-experimental design over a simple correlational study in resolving the directionality problem?
When evaluating the internal validity of a research design, a scientist observes that a quasi-experiment manipulates the independent variable prior to measuring the dependent variable. This established timeline allows the scientist to judge that the design successfully eliminates the _____, which is a significant barrier to causal inference in purely non-experimental studies.
A school counselor introduces a peer-mentoring program to at-risk ninth-graders in September and then collects academic self-efficacy scores from those same students in December. Because the program (independent variable) was implemented before the outcome measure (dependent variable) was collected, this quasi-experimental design resolves the directionality problem.
A peer reviewer examines a quasi-experimental study in which a sleep hygiene workshop (independent variable) was delivered to college students in week 1 and their academic performance (dependent variable) was measured in week 8. The reviewer concludes that the study resolves the directionality problem because the established _____ between manipulating the independent variable and measuring the dependent variable clarifies which variable is the potential cause and which is the effect.
A student is critically evaluating whether a quasi-experimental design successfully resolves the directionality problem. Place the following appraisal steps in the order the student should apply them to reach a well-justified judgment.
Describe how a quasi-experimental design eliminates the directionality problem. Specifically, identify the chronological sequence required between the independent and dependent variables, and explain how this sequence clarifies their relationship.
Explain why the researcher's quasi-experimental design successfully avoids the directionality problem compared to the correlational alternative.
You are designing a quasi-experimental study to test whether a new reading comprehension program improves student test scores. How would you sequence your independent variable (the program) and dependent variable (test scores) to ensure the directionality problem is resolved?