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Explain why Dr. Alvarez's decision to skip evaluating the measure is incorrect. What must she verify about the scale, and what is the broader scientific value of conducting this evaluation?
Case context: Dr. Alvarez is conducting research on cognitive fatigue in air traffic controllers. She plans to use a standardized cognitive fatigue scale that has demonstrated high reliability and validity across dozens of peer-reviewed studies involving university students. Since the scale has such an established track record, Dr. Alvarez initially decides that she does not need to analyze the reliability and validity of the scores obtained from her air traffic controller sample.
Question: Explain why Dr. Alvarez's decision to skip evaluating the measure is incorrect. What must she verify about the scale, and what is the broader scientific value of conducting this evaluation?
Sample answer: Dr. Alvarez cannot assume the scale worked as expected just because it has a strong track record. She must verify that the tool functioned effectively with her current participants (air traffic controllers) and under the specific conditions of her new study. Conducting this evaluation is valuable because it generates new evidence about the measure's psychometric properties, which must be documented and contributed to the scientific literature.
Key points:
- Understand that prior track record does not guarantee performance in a new sample
- Acknowledge the need to verify function under specific new conditions and with current participants
- Explain that evaluation generates new psychometric evidence
- Recognize that this new evidence must be documented and added to the scientific literature
Rubric: Full credit requires explaining: 1. Why prior performance does not guarantee function in a new sample or new testing conditions. 2. The need to verify the measure specifically for current participants (air traffic controllers) and conditions. 3. That the process generates new psychometric evidence which must be documented and added to the scientific literature.
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Research Methods in Psychology - 4th American Edition @ KPU
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