Compara mètodes

	Alfa de Cronbach per a formes curtes	Anàlisi Factorial Confirmatòria (CFA)
Camp	Psicometria	Psicometria
Família	Latent structure	Latent structure
Any d'origen	1951 (alpha); short-form practice codified 1980s–2000s	1969
Autor original	L. J. Cronbach (alpha); short-form application formalized across scale-abbreviation literature	Karl Gustav Jöreskog
Tipus	Internal consistency reliability coefficient	Hypothesis-testing latent variable model
Font seminal	Smith, G. T., McCarthy, D. M. & Anderson, K. G. (2000). On the sins of short-form development. Psychological Assessment, 12(1), 102–111.	Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202.
Àlies	abbreviated scale alpha, brief scale internal consistency, short-scale Cronbach's alpha, reduced-item alpha	CFA, confirmatory FA, measurement model, restricted factor analysis
Relacionats	4	4
Resum	Short-form Cronbach's alpha quantifies the internal consistency reliability of an abbreviated version of a psychological scale. It applies Cronbach's alpha formula to a reduced item set, verifying that the shortened instrument retains sufficient reliability to support valid score interpretation in research and applied contexts.	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.