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A psychology researcher is developing a new self-report scale to measure the Agreeableness dimension of the Five Factor Model, which ranges from cooperative, trustworthy, and good-natured to critical, uncooperative, and suspicious. Explain how the researcher should structure the item keying (both positively and negatively/reverse-keyed items) to ensure construct validity. Analyze the impact of acquiescence bias if the researcher only includes items describing high agreeableness (e.g., 'I am helpful' or 'I am trusting').
Question: A psychology researcher is developing a new self-report scale to measure the Agreeableness dimension of the Five Factor Model, which ranges from cooperative, trustworthy, and good-natured to critical, uncooperative, and suspicious. Explain how the researcher should structure the item keying (both positively and negatively/reverse-keyed items) to ensure construct validity. Analyze the impact of acquiescence bias if the researcher only includes items describing high agreeableness (e.g., 'I am helpful' or 'I am trusting').
Sample answer: To ensure construct validity, the researcher must design a balanced scale featuring both positively keyed items (e.g., 'I am helpful and trusting') and reverse-keyed items (e.g., 'I tend to be critical and suspicious'). If the scale only contains positively keyed items, it is vulnerable to acquiescence response bias, where participants tend to agree with statements regardless of their actual trait level. By reverse-coding items that represent the low end of the continuum, the researcher controls for this bias, ensuring that a high score truly reflects high Agreeableness rather than a simple tendency to agree, thereby improving the measurement's internal validity.
Key points:
- Identification of positive items (cooperative, trusting) and reverse-coded items (critical, suspicious) representing opposite ends of the Agreeableness continuum.
- Explanation of acquiescence response bias (the tendency to agree with items regardless of content).
- Analysis of how reverse-keying controls for acquiescence bias and maintains measurement validity.
Rubric: The answer should explain: 1) the definition of positive and reverse-keyed items in relation to the Agreeableness continuum, 2) how acquiescence bias occurs when all items are keyed in the same direction, and 3) how incorporating reverse-keyed items addresses this bias and enhances construct/internal validity.
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Research Methods in Psychology - 4th American Edition @ KPU
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A psychology researcher is developing a new self-report scale to measure the Agreeableness dimension of the Five Factor Model, which ranges from cooperative, trustworthy, and good-natured to critical, uncooperative, and suspicious. Explain how the researcher should structure the item keying (both positively and negatively/reverse-keyed items) to ensure construct validity. Analyze the impact of acquiescence bias if the researcher only includes items describing high agreeableness (e.g., 'I am helpful' or 'I am trusting').
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