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| Longitudinalni Mekdonaldov omega× | Kroenbahova Alfa (Analiza pouzdanosti)× | |
|---|---|---|
| Oblast≠ | Psihometrija | Statistika |
| Porodica | Latent structure | Latent structure |
| Godina nastanka≠ | 1999 (original omega); 2014 (longitudinal extension) | 1951 |
| Tvorac≠ | McDonald (1999); extended to longitudinal contexts by Geldhof, Preacher, and Zyphur (2014) and subsequent authors | Lee J. Cronbach |
| Tip | Reliability / internal consistency coefficient | Reliability / internal consistency coefficient |
| Temeljni izvor≠ | McDonald, R. P. (1999). Test Theory: A Unified Treatment. Lawrence Erlbaum Associates. ISBN: 978-0805830(textbook) | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ |
| Drugi nazivi | longitudinal omega, omega longitudinal reliability, time-varying omega, repeated-measures omega | coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha) |
| Srodne≠ | 3 | 4 |
| Sažetak≠ | Longitudinal McDonald's omega estimates scale reliability separately at each measurement occasion in a panel or repeated-measures study. By fitting a confirmatory factor model at each wave, it tracks how consistently a set of items measures its target construct over time, detecting erosion or improvement in measurement quality that a single omnibus reliability coefficient would obscure. | 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. |
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