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Ordinal McDonald's omega/Evidence
Method evidence record

Ordinal McDonald's omega

Ordinal McDonald's omega is a reliability coefficient designed for Likert-type and other ordinal rating scales. Unlike Cronbach's alpha, it bases its calculation on polychoric correlations among items — capturing the true latent relationships between ordinal responses — and uses factor-analytic loadings to estimate how much of the composite score variance is attributable to a common factor.

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Source record

Citations copied verbatim from the method’s source record. No claim-level verification is inferred from them.

Ordinal McDonald's Omega Reliability Coefficient
Taxonomic method record · 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
  • Gadermann, A. M., Guhn, M., & Zumbo, B. D. (2012). Estimating ordinal reliability for Likert-type and ordinal item response data: A conceptual, empirical, and practical guide. Practical Assessment, Research and Evaluation, 17(3), 1–13. · DOI 10.7275/n560-j767
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Related methods

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Taxonomic bucketConfirmatory factor analysismachine-suggested · Relational suggestion, not evidence.Same method familyCronbach's Alphamachine-suggested · Relational suggestion, not evidence.Taxonomic bucketItem Response Theorymachine-suggested · Relational suggestion, not evidence.

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Sources

2 recorded citations, copied from the method source record.

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