Krahasoni metodat

	Omega Makdonaldo ordinal	Teoria e Përgjigjes së Pjesëve (IRT)
Fusha	Psikometri	Psikometri
Familja	Latent structure	Latent structure
Viti i origjinës	2007	1952–1968
Krijuesi	Bruno D. Zumbo, Anne M. Gadermann, and Cornelia Zeisser (building on McDonald's 1999 omega framework)	Frederic M. Lord (and Allan Birnbaum for the 2PL/3PL models)
Lloji	Reliability coefficient	Probabilistic measurement model
Burimi themelues	Zumbo, B. D., Gadermann, A. M., & Zeisser, C. (2007). Ordinal versions of coefficients alpha and theta as measures of internal consistency for Likert rating scales. Journal of Modern Applied Statistical Methods, 6(1), 21–29.	Lord, F. M. & Novick, M. R. (1968). Statistical Theories of Mental Test Scores. Addison-Wesley.
Emërtime të tjera	omega ordinal, ordinal omega, polychoric omega, omega for ordinal data	IRT, latent trait theory, item characteristic curve theory, modern test theory
Të lidhura	3	5
Përmbledhja	Ordinal McDonald's omega is a reliability coefficient designed for Likert-type and other ordinal rating scales. Unlike Cronbach's alpha, it bases its calculation on polychoric correlations among items — capturing the true latent relationships between ordinal responses — and uses factor-analytic loadings to estimate how much of the composite score variance is attributable to a common factor.	Item response theory models the probability that a respondent answers an item correctly (or endorses it) as a function of the respondent's latent trait level and the item's own statistical properties — difficulty, discrimination, and guessing. Unlike classical test theory, IRT places persons and items on the same scale, yielding measurement that is sample-independent for items and test-independent for persons.