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Is coefficient alpha robust to nonnormal data? [PDF]
Frontiers in Psychology, 2012 Coefficient alpha has been a widely used measure by which internal consistency reliability is assessed. In addition to essential tau-equivalence and uncorrelated errors, normality has been noted as another important assumption for alpha.
Yanyan eSheng, Zhaohui eSheng
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Europe's Journal of Psychology, 2013 Heavy reliance on Cronbach’s alpha has been standard practice in many validation studies. However, there seem to be two misconceptions about the interpretation of alpha.
Panayiotis Panayides
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Meta-analysis of coefficient alpha for scores on the Narcissistic Personality Inventory. [PDF]
PLoS ONE, 2018 The Narcissistic Personality Inventory (NPI) has greatly facilitated the scientific study of trait narcissism. However, there is great variability in the reported reliability of scores on the NPI.
Brian K Miller +4 more
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Cronbachs alpha reliability coefficient
Psychiatry and Behavioral Sciences, 2016 In statistics, Cronbachs alpha coefficient is used as an estimate of the reliability of a psychometric test. It might have calculated either for each item in the scale or an average value for all items in the scale.
Selim Kılıc
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Coefficient alpha: Unnecessarily ambiguous; unduly ubiquitous [PDF]
SA Journal of Industrial Psychology, 2006 By means of simple numerical examples it is demonstrated how the value of coefficient alpha is determined by the size and sign of the item intercorrelations, the dimensionality of the items, and the number of items. Relatively high alphas may be obtained
G K Huysamen
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Thanks Coefficient Alpha, We Still Need You! [PDF]
Educ Psychol Meas, 2019 Raykov T, Marcoulides GA.
europepmc +2 more sources
Confidence Intervals for the Coefficient Alpha Difference from Two Independent Samples (Groups) [PDF]
Tutorials in Quantitative Methods for Psychology, 2023 Four different bootstrap methods for estimating confidence intervals (CIs) for a coefficient alpha difference from two independent samples (groups) were examined.
Padilla, Miguel A.
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Typology of Deflation-Corrected Estimators of Reliability
Frontiers in Psychology, 2022 The reliability of a test score is discussed from the viewpoint of underestimation of and, specifically, deflation in estimates or reliability. Many widely used estimators are known to underestimate reliability.
Jari Metsämuuronen, Jari Metsämuuronen
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A Direct Latent Variable Modeling Based Method for Point and Interval Estimation of Coefficient Alpha. [PDF]
Educ Psychol Meas, 2015 Raykov T, Marcoulides GA.
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Psicothema, 2023 Background: During the 20th century the alpha coefficient (α) was widely used in the estimation of the internal consistency reliability of test scores. After misuses were identified in the early 21st century alternatives became widespread, especially the omega coefficient (ω).
Doval Dieguez, Eduardo|| +2 more
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