Comparer des méthodes

	Analyse de la fiabilité longitudinale	Analyse longitudinale des items
Domaine	Psychométrie	Psychométrie
Famille	Latent structure	Latent structure
Année d'origine	1951–1979	1990s–2000s
Auteur d'origine	Paul B. Baltes, John R. Nesselroade, Lee J. Cronbach (foundational contributors)	Vandenberg, Lance, Meade and colleagues in organizational/educational measurement
Type	Reliability assessment	Item-level longitudinal diagnostic
Source fondatrice	Baltes, P. B., & Nesselroade, J. R. (1979). History and rationale of longitudinal research. In J. R. Nesselroade & P. B. Baltes (Eds.), Longitudinal research in the study of behavior and development (pp. 1–39). Academic Press.	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.
Alias	repeated-measures reliability, longitudinal consistency assessment, temporal reliability analysis, reliability over time	LIA, repeated-measures item analysis, longitudinal item calibration, item parameter stability analysis
Apparentées	4	6
Résumé	Longitudinal reliability analysis evaluates the consistency and stability of measurement instruments across two or more time points. It extends classical reliability concepts — internal consistency, test-retest stability, and measurement precision — to repeated-measures designs, ensuring that observed score changes reflect true change rather than measurement error.	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.