Σύγκριση μεθόδων

	Διστσαθμιας λογιστικη ΙRT μοντελο (2PL)	Διερευνητική Ανάλυση Παραγόντων (EFA)
Πεδίο	Ψυχομετρία	Στατιστική
Οικογένεια	Latent structure	Latent structure
Έτος προέλευσης	1980	—
Δημιουργός	Frederic M. Lord	—
Τύπος	Item response model / latent trait model	Latent variable / dimension reduction
Θεμελιώδης πηγή	Lord, F. M. (1980). Applications of Item Response Theory to Practical Testing Problems. Erlbaum.	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.
Εναλλακτικές ονομασίες	two-parameter logistic model, 2PL model, 2PL IRT — İki Parametreli Madde Tepki Modeli	common factor analysis, açımlayıcı faktör analizi, factor analysis
Συναφείς	6	4
Σύνοψη	The two-parameter logistic item response model, formalised by Frederic Lord (1980), describes the probability that a respondent answers a binary test item correctly as a smooth S-shaped function of the respondent's latent ability. By estimating a separate discrimination parameter for each item alongside a difficulty parameter, 2PL allows items to differ in how sharply they distinguish high- from low-ability respondents — making it the standard model for large-scale educational and psychological assessments.	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.