Σύγκριση μεθόδων

	Διαχρονική Ανάλυση Στοιχείων Κλίμακας	Επαληθευτική Παραγοντική Ανάλυση (Confirmatory Factor Analysis - CFA)
Πεδίο	Ψυχομετρία	Ψυχομετρία
Οικογένεια	Latent structure	Latent structure
Έτος προέλευσης	1990s–2000s	1969
Δημιουργός	Vandenberg, Lance, Meade and colleagues in organizational/educational measurement	Karl Gustav Jöreskog
Τύπος	Item-level longitudinal diagnostic	Hypothesis-testing latent variable model
Θεμελιώδης πηγή	Meade, A. W., Johnson, E. C. & Braddy, P. W. (2008). Power and sensitivity of alternative fit indices in tests of measurement invariance. Journal of Applied Psychology, 93(3), 568–592.	Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202.
Εναλλακτικές ονομασίες	LIA, repeated-measures item analysis, longitudinal item calibration, item parameter stability analysis	CFA, confirmatory FA, measurement model, restricted factor analysis
Συναφείς	6	4
Σύνοψη	Longitudinal item analysis examines how the statistical properties of individual scale items — difficulty, discrimination, factor loadings, and fit — remain stable or change systematically across repeated measurement occasions. It is the item-level foundation of longitudinal measurement validity.	Confirmatory factor analysis tests a researcher-specified factor structure against observed data. Unlike exploratory approaches, the researcher decides in advance which indicators load on which latent factor, and the model is evaluated by how closely the implied covariance matrix reproduces the sample covariance matrix. CFA is central to scale validation, construct validity assessment, and measurement invariance testing.