方法证据记录
Polytomous McDonald's omega
Polytomous McDonald's omega estimates the internal consistency reliability of a scale composed of ordinal (polytomous) items — such as Likert-type responses — by computing omega from a factor model fitted to the polychoric correlation matrix rather than the Pearson correlation matrix, yielding estimates that are unbiased by the discreteness of item responses.
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McDonald's Omega Reliability for Polytomous Items
分类方法记录 · latent-structure / psychometrics
- Zumbo, B. D., Gadermann, A. M., & Zeisser, C. (2007). Ordinal versions of coefficients alpha and theta as measures of internal consistency for Likert rating scales. Journal of Modern Applied Statistical Methods, 6(1), 21–29. · DOI 10.22237/jmasm/1177992180
- McDonald, R. P. (1999). Test theory: A unified treatment. Lawrence Erlbaum Associates. · ISBN 978-0805830750
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