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| クロンバックのα（信頼性分析）× | 再検査信頼性× | |
|---|---|---|
| 分野≠ | 統計学 | 心理測定学 |
| 系統 | Latent structure | Latent structure |
| 提唱年≠ | 1951 | 1904 |
| 提唱者≠ | Lee J. Cronbach | Karl Pearson |
| 種類≠ | Reliability / internal consistency coefficient | Reliability estimate |
| 原典≠ | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ | Nunnally, J. C. & Bernstein, I. H. (1994). Psychometric Theory (3rd ed.). McGraw-Hill. ISBN: 978-0070478497 |
| 別名 | coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha) | stability reliability, temporal stability, repeatability coefficient, TRT reliability |
| 関連 | 4 | 4 |
| 概要≠ | 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. | Test-retest reliability quantifies the temporal consistency of a measure by correlating scores obtained from the same participants on two separate occasions. It is a cornerstone of psychometric validation, directly indicating whether a scale or instrument yields stable scores when the underlying construct has not changed. |
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