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| Coefficiente Kappa di Cohen× | Alpha di Cronbach (Analisi di Affidabilità)× | |
|---|---|---|
| Campo | Statistica | Statistica |
| Famiglia≠ | Hypothesis test | Latent structure |
| Anno di origine≠ | 1960 | 1951 |
| Ideatore≠ | Jacob Cohen | Lee J. Cronbach |
| Tipo≠ | Inter-rater reliability coefficient | Reliability / internal consistency coefficient |
| Fonte seminale≠ | Cohen, J. (1960). A Coefficient of Agreement for Nominal Scales. Educational and Psychological Measurement, 20(1), 37–46. DOI ↗ | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ |
| Alias≠ | kappa coefficient, kappa statistic, Cohen's Kappa (Değerlendiriciler Arası Uyum) | coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha) |
| Correlati≠ | 3 | 4 |
| Sintesi≠ | Cohen's kappa (κ) is a statistical measure of inter-rater reliability for categorical classifications, introduced by Jacob Cohen in 1960. Unlike simple percent agreement, kappa corrects for the level of agreement that would be expected purely by chance, making it the standard metric when two raters independently assign observations to the same set of mutually exclusive categories. | 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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