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| McDonald's Omega (ω) Reliabilitätskoeffizient× | Exploratorische Faktorenanalyse (EFA)× | |
|---|---|---|
| Fachgebiet≠ | Psychometrie | Statistik |
| Familie | Latent structure | Latent structure |
| Entstehungsjahr≠ | 1999 | — |
| Urheber≠ | Roderick P. McDonald | — |
| Typ≠ | Reliability coefficient / latent variable model | Latent variable / dimension reduction |
| Wegweisende Quelle≠ | McDonald, R. P. (1999). Test Theory: A Unified Treatment. Lawrence Erlbaum Associates. ISBN: 978-0805830750 | Fabrigar, L. R., Wegener, D. T., MacCallum, R. C. & Strahan, E. J. (1999). Evaluating the use of exploratory factor analysis in psychological research. Psychological Methods, 4(3), 272–299. DOI ↗ |
| Aliasnamen≠ | omega reliability, ω coefficient, omega total, omega hierarchical | common factor analysis, açımlayıcı faktör analizi, factor analysis |
| Verwandt≠ | 6 | 4 |
| Zusammenfassung≠ | McDonald's omega is a factor-analysis-based reliability coefficient introduced by Roderick P. McDonald (1999) that quantifies the internal consistency of a composite score without requiring the restrictive assumption that all items contribute equally to the latent factor. It yields two complementary indices: ω_total, which captures overall reliability of the sum score, and ω_hierarchical (ωh), which reports how much of the composite's variance is explained specifically by a single general factor. | Exploratory factor analysis reduces a large set of observed variables into a smaller number of latent common factors. It is widely used in scale development and psychometrics to uncover the dimensional structure that underlies a set of correlated items, without specifying that structure in advance. |
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