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Best Alternatives to Cronbach's Alpha Reliability in Realistic Conditions: Congeneric and Asymmetrical Measurements

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Alvarado Izquierdo, Jesús María y Trizano Hermosilla, Italo (2016) Best Alternatives to Cronbach's Alpha Reliability in Realistic Conditions: Congeneric and Asymmetrical Measurements. Frontiers in psychology, 7 . ISSN 1664-1078

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URL Oficial: http://dx.doi.org/10.3389/fpsyg.2016.00769




Resumen

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.


Tipo de documento:Artículo
Palabras clave:Reliability, Alpha, Omega, Greatest lower bound, Asymmetrical measures
Materias:Ciencias Biomédicas > Psicología > Psicometría
Código ID:38053
Depositado:17 Jun 2016 11:18
Última Modificación:18 Jul 2016 07:14

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