Comparer des méthodes

	Fiabilité test-retest de forme courte	Alpha de Cronbach (Analyse de fiabilité)
Domaine	Psychométrie	Statistique
Famille	Latent structure	Latent structure
Année d'origine	1990s–2000s	1951
Auteur d'origine	Derived from classical test-retest reliability; short-form methodology formalised by Smith, McCarthy & Anderson (2000) among others	Lee J. Cronbach
Type	Reliability estimation	Reliability / internal consistency coefficient
Source fondatrice	Smith, G. T., McCarthy, D. M., & Anderson, K. G. (2000). On the sins of short-form development. Psychological Assessment, 12(1), 102–111.	Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334.
Alias	abbreviated scale temporal stability, short-form temporal consistency, retest reliability of short forms, SF test-retest	coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha)
Apparentées	4	4
Résumé	Short-form test-retest reliability quantifies how consistently an abbreviated version of a measurement instrument produces the same scores across two administrations separated by a defined time interval. It is a critical validation step whenever a full-length scale is shortened for practical use, confirming that item reduction has not degraded temporal stability.	Cronbach's alpha is a coefficient of internal consistency that quantifies the degree to which a set of items on a scale measures the same underlying construct. Introduced by Lee J. Cronbach in 1951, it remains the most widely reported reliability index in social-science, health, and educational research.