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| 級内相関係数（ICC）× | クロンバックのα（信頼性分析）× | |
|---|---|---|
| 分野 | 統計学 | 統計学 |
| 系統≠ | Hypothesis test | Latent structure |
| 提唱年≠ | 1979 | 1951 |
| 提唱者≠ | Shrout & Fleiss | Lee J. Cronbach |
| 種類≠ | Reliability / agreement coefficient | Reliability / internal consistency coefficient |
| 原典≠ | Shrout, P.E. & Fleiss, J.L. (1979). Intraclass Correlations: Uses in Assessing Rater Reliability. Psychological Bulletin, 86(2), 420–428. DOI ↗ | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ |
| 別名 | ICC, intraclass correlation, rater reliability coefficient, Sınıf İçi Korelasyon Katsayısı (ICC) | coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha) |
| 関連≠ | 5 | 4 |
| 概要≠ | The Intraclass Correlation Coefficient (ICC) is a parametric reliability statistic that quantifies the degree of agreement or consistency among repeated measurements or multiple raters on a continuous outcome. The modern six-form taxonomy was established by Shrout and Fleiss in 1979 and remains the standard framework for selecting and reporting ICC in inter-rater reliability, test-retest repeatability, and multilevel-data analyses. | 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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