List and describe the most common methods of reliability assessment.
Answer to relevant QuestionsHow do categorical and quantitative variables differ? If a scale has 0 reliability, can it be valid? If a scale has high reliability, such as = .9, does that necessarily mean that it is valid? Explain. How can we correct for attenuation of correlation due to unreliability? Under what circumstances does correction for attenuation due to unreliability yield inaccurate results? How is α related to p, the number of items, when the mean inter-item correlation is held constant? Examine the data in Table 21.5, which report the outcomes for the Physician’s Health Study that assessed the effect of a low-dose aspirin regimen on risk of heart attack. a. For the group of patients that had the low-dose ...
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