Methoden vergleichen

	Ordinales Rasch-Modell (Rating Scale und Partial Credit Model)	Bestätigende Faktorenanalyse (CFA)
Fachgebiet	Psychometrie	Psychometrie
Familie	Latent structure	Latent structure
Entstehungsjahr	1978–1982	1969
Urheber	David Andrich (RSM, 1978); Geoff Masters (PCM, 1982)	Karl Gustav Jöreskog
Typ	Item response model for ordered categories	Hypothesis-testing latent variable model
Wegweisende Quelle	Andrich, D. (1978). A rating formulation for ordered response categories. Psychometrika, 43(4), 561–573.	Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202.
Aliasnamen	Rating Scale Model, Partial Credit Model, RSM, PCM	CFA, confirmatory FA, measurement model, restricted factor analysis
Verwandt	6	4
Zusammenfassung	The ordinal Rasch model extends the dichotomous Rasch framework to items with ordered response categories such as Likert-type scales. It places both persons and items on a shared interval-level metric, enabling principled measurement from ordinal data while checking whether items function consistently across all response thresholds.	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.