| 周艺彪,赵根明.测量的可靠性及其估计方法[J].Chinese journal of Epidemiology,2003,24(12):1146-1149 |
| 测量的可靠性及其估计方法 |
| Reliability of measurement and the methods of estimating reliability |
| Received:March 15, 2003 |
| DOI： |
| KeyWord: Kappa指数 组内相关系数 克朗巴哈α系数 |
| English Key Word: Kappa index Intra-class correlation coefficient Cro nbach' s alpha coefficient |
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| Abstract: |
| 目的 探讨测量可靠性的估计方法及其局限。方法 结合实例进行可靠性的计算和分析测量可靠性方法的不足。结果 2名病理学者间可靠性Kappa值为0.793;观察者对具有不同患病率的人群分类时,其Kappa值分别为0.800和 0.137,变化较大 ;A型行为综合指标的克朗巴哈α系数为 0.552。结论 Kappa指数和α系数都具有内在人群特性,在推广到不同人群,都需进行可靠性测定。 |
| English Abstract: |
| Objective To explore the methods of estimating measurement reliability and their limitationsMethods According to the given examples, reliabilities of measurement were calculated and limitations of the methods of estimating reliability w ere analyzedResults The Kappa value of interobserver reliability was 0.793 between two patho logists.Between the two populations with different prevalence rates, the values of Kappa were 0.800 and 0.137 respectively, and with big difference.Cronbach' s alpha coefficient of compositive index for A type behavior was 0.55.Conclusion The Kappaindex and alpha coefficient w ere bo th inherently po pula tio n-specific.Before generalizing to different populations, the reliability needs to be measured. |
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