From alpha to omega: A practical solution to the pervasive problem of internal consistency estimation
From alpha to omega: A practical solution to the pervasive problem of internal consistency estimation
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DOI：
10.1111/bjop.12046
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发表时间：
2014-08-01
影响因子：
4
通讯作者：
Brunsden, Vivienne
中科院分区：
文献类型：
--
作者：
Dunn, Thomas J.;Baguley, Thom;Brunsden, Vivienne
在心理学研究中，alpha系数是最常用的可靠性（当然也包括内部一致性可靠性）测量方法。这是值得注意的，因为在心理测量学文献中有大量的不足。这种理论与实践之间的不匹配似乎部分是因为心理量表的使用者不熟悉关于alpha系数的心理测量文献，部分是因为alpha的替代方法并不广为人知。我们简要回顾了有关系数α的心理测量学文献，然后以系数ω的形式提出了一个实用的替代方案。为了便于从alpha到omega的转换，我们还提供了一个使用免费的开源软件环境计算omega的点和区间估计的简要指南。
Coefficient alpha is the most popular measure of reliability (and certainly of internal consistency reliability) reported in psychological research. This is noteworthy given the numerous deficiencies of coefficient alpha documented in the psychometric literature. This mismatch between theory and practice appears to arise partly because users of psychological scales are unfamiliar with the psychometric literature on coefficient alpha and partly because alternatives to alpha are not widely known. We present a brief review of the psychometric literature on coefficient alpha, followed by a practical alternative in the form of coefficient omega. To facilitate the shift from alpha to omega, we also present a brief guide to the calculation of point and interval estimates of omega using a free, open source software environment.