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	Polytomous Construct Validity	Exploratory Factor Analysis (EFA)
Odbor	Psychometria	Štatistika
Rodina	Latent structure	Latent structure
Rok vzniku	1992–2000	—
Tvorca	Building on Messick (1989) and IRT extensions by Masters, Muraki, and Samejima	—
Typ	Psychometric validity framework	Latent variable / dimension reduction
Pôvodný zdroj	Muraki, E. (1992). A generalized partial credit model: Application of an EM algorithm. Applied Psychological Measurement, 16(2), 159–176.	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.
Ďalšie názvy	polytomous item construct validity, ordered-category construct validity, polytomous measurement validity, multi-category scale validity	common factor analysis, açımlayıcı faktör analizi, factor analysis
Príbuzné	6	4
Zhrnutie	Polytomous construct validity refers to the evaluation of whether a scale composed of ordered, multi-category items (e.g., Likert or rating-scale items) genuinely measures the intended latent construct. It extends classical validity frameworks to polytomous measurement models — such as the Graded Response Model or Generalized Partial Credit Model — ensuring that ordered response categories function as designed and that the resulting scores reflect the target construct.	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.