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Explain why this proposed survey item is classified as a bipolar scale. Based on survey design best practices, decide how many points the scale should have to be most effective and explain the reasoning behind this decision.
Case context: A social psychologist is designing a survey to measure participants' attitudes toward a new community intervention program. They want to assess attitude along a spectrum ranging from extreme agreement to extreme disagreement. They construct a rating scale with the opposing endpoints 'Agree very much' and 'Disagree very much' but are undecided on the number of response options to provide.
Question: Explain why this proposed survey item is classified as a bipolar scale. Based on survey design best practices, decide how many points the scale should have to be most effective and explain the reasoning behind this decision.
Sample answer: This item is classified as a bipolar scale because it measures the participant's attitude along a dichotomous spectrum of agreement, ranging from a positive pole ('Agree very much') to a negative pole ('Disagree very much'). Based on survey design principles, the researcher should use a -point format because -point formats are typically the most effective for capturing responses along these types of dichotomous, bipolar spectra.
Key points:
- Identifies that the scale measures a construct along a dichotomous spectrum (agreement vs. disagreement)
- Classifies the scale as a bipolar scale
- Recommends using a -point format
- Explains that a -point format is typically the most effective for bipolar scales
Rubric: Full credit requires the student to explain that the scale is bipolar because it spans a dichotomous spectrum (agree vs. disagree) and to recommend a -point format because it is the most effective layout for capturing responses on a bipolar spectrum.
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Research Methods in Psychology - 4th American Edition @ KPU
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