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Based on the principles of minimizing non-response bias, which researcher's strategy demonstrates a better understanding of survey methodology, and how does the fundamental weakness of statistical corrections justify this choice?
Case context: A research team is conducting a university-wide survey on undergraduate mental health resources. After the initial email invitation, they find that only 15% of the student body has completed the survey. The lead investigator suggests that they should not worry about the low turnout and simply use statistical weighting techniques later to adjust for the missing demographic groups. A junior researcher argues that they should instead dedicate the next two weeks to sending reminder emails, offering small incentives, and campaigning in classes to get the response rate up to at least 50%.
Question: Based on the principles of minimizing non-response bias, which researcher's strategy demonstrates a better understanding of survey methodology, and how does the fundamental weakness of statistical corrections justify this choice?
Sample answer: The junior researcher's strategy demonstrates a better understanding because it focuses on proactively maximizing the survey response rate to prevent non-response bias. The lead investigator's reliance on post-data collection statistical corrections is flawed because those techniques depend on assumptions about the non-responders. If those assumptions regarding the missing 85% of students are incorrect, the statistical corrections will not accurately fix the bias. Therefore, the junior researcher's plan to minimize the number of non-responders is the superior strategy.
Key points:
- The junior researcher's proactive approach is the superior strategy.
- Maximizing the overall response rate is the most effective way to address non-response bias.
- Statistical corrections rely heavily on assumptions about the non-participating individuals.
- If the assumptions about the non-responding students are incorrect, the statistical adjustments will be invalid.
Rubric: The response must endorse the junior researcher's proactive approach (maximizing response rate) and explain that the lead investigator's statistical corrections are vulnerable because they rely on potentially incorrect assumptions about the non-participating students.
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Research Methods in Psychology - 4th American Edition @ KPU
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