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Identify which of the four actions described in the scenario correspond to the strategies of a 'fishing expedition' in exploratory analysis, and explain the underlying purpose of conducting these exploratory steps.
Case context: A psychology researcher examining stress and academic performance does not find a significant correlation in their main analysis. They decide to explore the dataset further. They group participants by year of study (freshmen vs. seniors) to run separate analyses, construct a new combined index for stress based on multiple survey items, temporarily exclude three highly anomalous test scores, and sort the data differently to see if they can detect hidden patterns.
Question: Identify which of the four actions described in the scenario correspond to the strategies of a 'fishing expedition' in exploratory analysis, and explain the underlying purpose of conducting these exploratory steps.
Sample answer: The four actions match the exploratory strategies as follows: grouping by year of study represents analyzing demographic subsets separately; constructing a new combined index represents creating new composite variables; excluding anomalous test scores represents temporarily dropping anomalous data points; and sorting data differently represents reorganizing information to highlight hidden trends. The underlying purpose of conducting these steps is to extensively examine the data from multiple perspectives to find interesting trends or patterns that were not visible in the initial analysis.
Key points:
- Analyzing demographic subsets separately (grouping by year of study).
- Creating new composite variables (constructing a combined stress index).
- Temporarily dropping anomalous data points (excluding anomalous test scores).
- Reorganizing information to highlight hidden trends (sorting data differently).
- The general goal is to extensively examine data from multiple perspectives to highlight hidden patterns.
Rubric: Grading Rubric: - 4 points: Correctly map each of the four actions in the case study to its corresponding exploratory strategy. - 1 point: Correctly explain that the purpose of these steps is to examine the data from multiple perspectives to uncover hidden trends or patterns.
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Research Methods in Psychology - 4th American Edition @ KPU
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