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On the Relationship Between Coefficient Alpha and Composite Reliability

机译：系数α与复合可靠度的关系

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摘要

Cronbach’s coefficient alpha is the most widely used estimator of the reliability of tests and scales. However, it has been criticized as being a lower bound and hence underestimating true reliability. A popular alternative to coefficient alpha is composite reliability, which is usually calculated in conjunction with structural equation modeling. A quantitative analysis of 2,524 pairs of coefficient alpha and composite reliability values derived from empirical investigations revealed that although the average composite reliability value (.86) exceeded the average corresponding coefficient alpha value (.84), the difference was relatively inconsequential for practical applications such as meta-analysis.
机译：克伦巴赫系数α是测试和量表可靠性最广泛使用的估算器。但是，它被批评为下限，因此低估了真实的可靠性。系数α的一种流行替代方法是复合可靠性，通常是结合结构方程模型来计算的。对来自实证研究的2,524对系数α和复合可靠性值的定量分析显示，尽管平均复合可靠性值（.86）超过了相应的平均系数α值（.84），但对于实际应用而言，这种差异相对较小作为荟萃分析。

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