Methoden vergleichen

	Rasch-Modell	Exploratorische Faktorenanalyse (EFA)
Fachgebiet	Psychometrie	Statistik
Familie	Latent structure	Latent structure
Entstehungsjahr	1960	—
Urheber	Georg Rasch	—
Typ	Item Response Theory / Latent trait model	Latent variable / dimension reduction
Wegweisende Quelle	Rasch, G. (1960). Probabilistic Models for Some Intelligence and Attainment Tests. Danish Institute for Educational Research, Copenhagen.	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.
Aliasnamen	1PL IRT, one-parameter logistic model, Rasch Modeli — 1PL IRT, 1PL model	common factor analysis, açımlayıcı faktör analizi, factor analysis
Verwandt	6	4
Zusammenfassung	The Rasch model, introduced by Georg Rasch in 1960, is the simplest member of the Item Response Theory (IRT) family. It assigns a single difficulty parameter to each test item and places both item difficulties and person abilities on the same logit scale, enabling direct, sample-independent comparison of items and persons.	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.