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Confidence intervals for Cronbach's reliability coefficient

机译:Cronbach可靠性系数的置信区间

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Cronbach's alpha reliability coefficient was suggested as measure of the internal consistency of a questionnaire. The focus of this work is on the interval estimation of the alpha coefficient. Iacobucci and Duhachek (2003) and Koning and Franses (2006) explored transformations for constructing confidence intervals for the true value of alpha based on the asymptotic distribution of the estimate of the coefficient van Zyl et al. (2000). Padilla et al. (2012) examined confidence intervals for the alpha coefficient using bootstrap with non normal populations. We provide an alternative transformation of the alpha coefficient and construct confidence intervals for the true value. In order to do this we also employ the asymptotic distribution of the estimate of the coefficient van Zyl et al. (2000). Simulation studies are performed to demonstrate our methodology when the data are continuous and when they are converted to a Likert scale. A comparison with some present methodologies including the bootstrap methodology is presented as well.
机译:Cronbach的alpha可靠性系数被建议为调查问卷的内部一致性的衡量标准。这项工作的重点是alpha系数的间隔估计。 Iacobucci和Duhachek(2003)和Koning and Franses(2006)探讨了基于系数van Zyl等人估计的渐近分布构建α的真实值的置信区间的变化。 (2000)。 Padilla等人。 (2012)使用非普通群体的自举检查alpha系数的置信区间。我们提供alpha系数的替代变换,并构建真实值的置信区间。为了做到这一点,我们还采用了系数van Zyl等人的估计的渐近分布。 (2000)。进行模拟研究以展示当数据是连续的,并且当它们转换为李克特量表时的方法。还提出了与包括引导方法包括引导方法的一些现有方法的比较。

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