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A psychologist is planning a 2x2 experiment. She is deciding whether to run it as a between-subjects design, a within-subjects design, or a mixed design. According to the principles of a factorial ANOVA, what must be done to the calculations of the test once she finalizes her design choice, and why?
Question: A psychologist is planning a 2x2 experiment. She is deciding whether to run it as a between-subjects design, a within-subjects design, or a mixed design. According to the principles of a factorial ANOVA, what must be done to the calculations of the test once she finalizes her design choice, and why?
Sample answer: The researcher must modify the specific mathematical calculations of the factorial ANOVA. This modification is necessary because the math depends on whether the study utilizes a between-subjects, within-subjects, or mixed design.
Key points:
- Identifies that the specific mathematical calculations of the factorial ANOVA must be modified
- Applies this modification requirement to the design types: between-subjects, within-subjects, or mixed
- Explains that the calculations depend directly on the chosen experimental design
Rubric: The response must apply the rule that factorial ANOVA mathematical calculations need to be modified depending on the specific design used (between-subjects, within-subjects, or mixed).
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Research Methods in Psychology - 4th American Edition @ KPU
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Test Statistics in Factorial ANOVA
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A researcher is planning to analyze their experimental data using a factorial ANOVA. Arrange the following steps of the statistical planning and calculation process in the correct logical order.
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A psychologist is planning a 2x2 experiment. She is deciding whether to run it as a between-subjects design, a within-subjects design, or a mixed design. According to the principles of a factorial ANOVA, what must be done to the calculations of the test once she finalizes her design choice, and why?