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Best Alternatives to Cronbachs Alpha Reliability in Realistic Conditions: Congeneric and Asymmetrical Measurements

机译:现实条件下Cronbach Alpha可靠性的最佳替代方案:同类和非对称测量

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摘要

The Cronbach's alpha is the most widely used method for estimating internal consistency reliability. This procedure has proved very resistant to the passage of time, even if its limitations are well documented and although there are better options as omega coefficient or the different versions of glb, with obvious advantages especially for applied research in which the ítems differ in quality or have skewed distributions. In this paper, using Monte Carlo simulation, the performance of these reliability coefficients under a one-dimensional model is evaluated in terms of skewness and no tau-equivalence. The results show that omega coefficient is always better choice than alpha and in the presence of skew items is preferable to use omega and glb coefficients even in small samples.
机译:Cronbach的alpha是估计内部一致性可靠性的最广泛使用的方法。尽管有很好的证明文件,并且尽管有更好的选择,例如欧米伽系数或glb的不同版本,但该程序已证明对时间的流逝具有很高的抵抗力,特别是对于那些软件的质量或质量有所不同的应用研究,它具有明显的优势。分布偏斜。在本文中,使用蒙特卡洛模拟,在偏度和无tau等效性方面评估了一维模型下这些可靠性系数的性能。结果表明,ω系数总是比α更好的选择,并且在存在倾斜项的情况下,即使在小样本中,也优选使用ω和glb系数。

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