Comparer des méthodes

	McDonald's oméga pour forme abrégée	Analyse Factorielle Confirmatoire (AFC)
Domaine	Psychométrie	Psychométrie
Famille	Latent structure	Latent structure
Année d'origine	1999 (omega); short-form application 1990s–2000s	1969
Auteur d'origine	Roderick P. McDonald (omega); short-form application systematised across psychometric literature	Karl Gustav Jöreskog
Type	Reliability coefficient for abbreviated scales	Hypothesis-testing latent variable model
Source fondatrice	McDonald, R. P. (1999). Test theory: A unified treatment. Lawrence Erlbaum Associates. ISBN: 978-0805830750	Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202.
Alias	omega for abbreviated scales, short-scale omega, omega-total short form, abbreviated scale reliability	CFA, confirmatory FA, measurement model, restricted factor analysis
Apparentées	4	4
Résumé	Short-form McDonald's omega applies the omega reliability coefficient to abbreviated or shortened versions of psychological scales. It provides a theoretically sound reliability estimate that accounts for the multidimensional structure of the short instrument, enabling researchers to evaluate whether abbreviation has preserved the reliability of the original full-length scale.	Confirmatory factor analysis tests a researcher-specified factor structure against observed data. Unlike exploratory approaches, the researcher decides in advance which indicators load on which latent factor, and the model is evaluated by how closely the implied covariance matrix reproduces the sample covariance matrix. CFA is central to scale validation, construct validity assessment, and measurement invariance testing.