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Based on the principles of measuring 'financial responsibility,' explain how the research group's updated survey design allows them to create a multiple-item measure of 'academic grit.'
Case context: A research group is designing a survey to measure the construct of 'academic grit.' Originally, they planned to ask students to report their GPA, the number of hours they study per week, and a yes/no question about whether they ever skip class. After consulting a research methods textbook, they decide instead to write statements about study habits and ask participants to rate how strongly they agree with each on a scale from (Strongly Disagree) to (Strongly Agree).
Question: Based on the principles of measuring 'financial responsibility,' explain how the research group's updated survey design allows them to create a multiple-item measure of 'academic grit.'
Sample answer: The original plan used separate, unrelated questions with different metrics (GPA, hours, yes/no), which cannot be mathematically combined. By switching to statements all rated on the same five-point scale, the researchers collected structured responses. They can now sum or average these responses to calculate a single, reliable overall score representing the construct of academic grit.
Key points:
- Recognizes that the original variables (GPA, hours, yes/no) were unrelated and couldn't be easily combined mathematically.
- Identifies that the statements use a uniform five-point scale.
- Explains that structured responses on the same scale can be mathematically aggregated.
- States that summing or averaging these responses will produce a single, reliable overall score for the construct.
Rubric: The response should demonstrate an understanding of why variables on different scales cannot be combined, and how using a uniform scale allows for mathematical aggregation to measure a construct.
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Research Methods in Psychology - 4th American Edition @ KPU
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