השוואת שיטות

	מקדם המהימנות או-מגה (ω) של מקדונלד	ניתוח גורמים מאשר (Confirmatory Factor Analysis - CFA)	אלפא של קרונבך (ניתוח מהימנות)
תחום	פסיכומטריה	סטטיסטיקה	סטטיסטיקה
משפחה	Latent structure	Latent structure	Latent structure
שנת המקור	1999	1969	1951
הוגה השיטה	Roderick P. McDonald	Karl Jöreskog	Lee J. Cronbach
סוג	Reliability coefficient / latent variable model	Confirmatory latent variable model	Reliability / internal consistency coefficient
מקור מכונן	McDonald, R. P. (1999). Test Theory: A Unified Treatment. Lawrence Erlbaum Associates. ISBN: 978-0805830750	Brown, T. A. (2015). Confirmatory Factor Analysis for Applied Research (2nd ed.). The Guilford Press. ISBN: 978-1462515363	Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334.
כינויים	omega reliability, ω coefficient, omega total, omega hierarchical	Doğrulayıcı Faktör Analizi (CFA), confirmatory factor analysis, measurement model	coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha)
קשורות	6	4	4
תקציר	McDonald's omega is a factor-analysis-based reliability coefficient introduced by Roderick P. McDonald (1999) that quantifies the internal consistency of a composite score without requiring the restrictive assumption that all items contribute equally to the latent factor. It yields two complementary indices: ω_total, which captures overall reliability of the sum score, and ω_hierarchical (ωh), which reports how much of the composite's variance is explained specifically by a single general factor.	Confirmatory factor analysis tests whether a researcher-specified factor structure fits the observed data. Formalised by Karl Jöreskog in 1969, it is the measurement-model step within structural equation modelling and is the standard tool for validating the factorial structure of scales and questionnaires before comparing groups or estimating latent relationships.	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.