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Explain why the student's assumption is incorrect, and describe how the four frameworks collectively cover the different dimensions of an experiment's methodology as detailed in the text.
Case context: A research student is drafting a methodology evaluation checklist for an upcoming psychology lab project. They read that they must evaluate whether the study is sound and accurate. To do this, they plan to use the framework of the 'Four Big Validities'. However, the student initially believes that they only need to assess one of the validities to determine the overall soundness of the study.
Question: Explain why the student's assumption is incorrect, and describe how the four frameworks collectively cover the different dimensions of an experiment's methodology as detailed in the text.
Sample answer: The student's assumption is incorrect because each of the four validities addresses a different dimension of the experiment's methodology. To assess whether a study is sound and accurate, the researcher must look at multiple dimensions. Collectively, the four frameworks cover: how well the experiment establishes causality (internal validity), how well it generalizes to the real world (external validity), the quality of its manipulations (construct validity), and the appropriateness of its statistical conclusions (statistical validity). Relying on just one would leave the other critical dimensions of the methodology unexamined.
Key points:
- Explains that a single validity is insufficient because each framework addresses a different dimension of the methodology.
- Explains that the validities collectively assess causality, generalization, manipulation quality, and statistical conclusions.
- Concludes that all four frameworks are needed to determine if a study is sound and accurate.
Rubric: Responses should explain that a single validity is insufficient because each framework targets a unique methodological dimension. They must outline the specific dimensions covered by the four frameworks collectively (causality, generalization, quality of manipulations, and statistical conclusions) to show understanding of how they work together.
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KPU
Research Methods in Psychology - 4th American Edition @ KPU
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Statistical Validity
Internal Validity
External Validity
Construct Validity
Prioritizing Validities
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