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	Flergruppsanalys av testobjekt	Flergrupps konfirmatorisk faktoranalys (MG-CFA)
Ämnesområde	Psykometri	Psykometri
Familj	Latent structure	Latent structure
Ursprungsår	1986	1971
Upphovsperson	Classical test theory tradition; systematised by Crocker & Algina (1986)	Karl Jöreskog
Typ	Comparative item-level analysis	Measurement model / invariance test
Ursprungskälla	Crocker, L. & Algina, J. (1986). Introduction to Classical and Modern Test Theory. Holt, Rinehart and Winston. ISBN: 978-0030616341	Vandenberg, R. J. & Lance, C. E. (2000). A review and synthesis of the measurement invariance literature: Suggestions, practices, and recommendations for organizational research. Organizational Research Methods, 3(1), 4–70.
Alias	MGIA, group-comparative item analysis, subgroup item analysis, cross-group item analysis	MG-CFA, multi-group CFA, measurement invariance testing, multi-sample CFA
Närliggande	6	6
Sammanfattning	Multi-group item analysis computes classical item statistics — difficulty, discrimination, and corrected item-total correlations — separately for each subgroup in a sample and then compares those statistics across groups. It is a standard diagnostic step in scale development and test fairness evaluation, revealing items that behave differently for men versus women, across age cohorts, or across cultural groups before more formal DIF testing.	Multi-group confirmatory factor analysis tests whether a measurement model holds equivalently across two or more groups — such as cultures, genders, or time points. By imposing increasingly stringent equality constraints and comparing model fit, it determines whether comparisons of latent mean scores are justified.