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| Hệ số Omega Phân cấp của McDonald (ωh)× | Phân tích Cronbach's Alpha (Độ tin cậy)× | |
|---|---|---|
| Lĩnh vực≠ | Trắc lượng tâm lý | Thống kê |
| Họ | Latent structure | Latent structure |
| Năm ra đời≠ | 1999 | 1951 |
| Người khởi xướng≠ | Roderick P. McDonald | Lee J. Cronbach |
| Loại≠ | Reliability / composite score validity coefficient | Reliability / internal consistency coefficient |
| Công trình gốc≠ | Reise, S. P., Scheines, R., Widaman, K. F. & Haviland, M. G. (2013). Multidimensionality and structural coefficient bias in structural equation modeling: A bifactor perspective. Educational and Psychological Measurement, 73(1), 5–26. DOI ↗ | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ |
| Tên gọi khác≠ | omega hierarchical, omega-h, bifactor omega, composite score validity coefficient | coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha) |
| Liên quan≠ | 5 | 4 |
| Tóm tắt≠ | McDonald's hierarchical omega (ωh) is a coefficient derived from a bifactor confirmatory factor model that quantifies what proportion of total-score variance is attributable to a single general factor rather than to group-specific factors or item-level error. Introduced by Roderick P. McDonald (1999) and elaborated for bifactor applications by Reise and colleagues (2013) and Rodriguez and colleagues (2016), it is the primary index used in psychometrics to evaluate whether a composite total score is a defensible summary of a multidimensional scale. | 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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