Comparer des méthodes

	Fiabilité test-retest longitudinale	Test de l'invariance longitudinale de la mesure
Domaine	Psychométrie	Psychométrie
Famille	Latent structure	Latent structure
Année d'origine	1904 (test-retest); longitudinal application formalized mid-20th century	1993
Auteur d'origine	Spearman, Charles; extended to longitudinal contexts by psychometric theorists	William Meredith
Type	Reliability estimation / temporal stability	Measurement model testing
Source fondatrice	Nunnally, J. C. & Bernstein, I. H. (1994). Psychometric Theory (3rd ed.). McGraw-Hill. ISBN: 978-0070478497	Meredith, W. (1993). Measurement invariance, factor analysis and factorial invariance. Psychometrika, 58(4), 525–543.
Alias	longitudinal stability reliability, repeated-measurement reliability, temporal stability across waves, longitudinal retest coefficient	LMI, longitudinal invariance, measurement equivalence across time, temporal measurement invariance
Apparentées	3	3
Résumé	Longitudinal test-retest reliability quantifies how consistently a scale or measure performs across two or more time points in a longitudinal study. It extends the classic test-retest paradigm by accounting for planned, often substantive, time lags between waves — making it essential for validating instruments used in panel, cohort, or growth-curve research.	Longitudinal measurement invariance testing determines whether a psychological scale measures the same construct in the same way across two or more time points. It is a prerequisite for interpreting mean-level change scores in panel and repeated-measures studies, ensuring that observed change reflects true change in the construct rather than drift in the measurement instrument.