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Asymptotically distribution free (adf) interval estimation of coefficient alpha

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Author Info
ALBERTO MAYDEU () (Instituto de Empresa)

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Abstract

Asymptotic distribution free (ADF) interval estimators for coefficient alpha were introduced in the context of an application by Yuan, Guarnaccia, and Hayslip (2003). Here, simulation studies were performed to investigate the behavior of ADF vs. normal theory (NT) interval estimators of coefficient alpha for tests composed of ordered categorical items under varied conditions of sample size, item skewness and kurtosis, number of items, and average inter-item correlation. NT intervals were found to be inaccurate when item skewness > 1 or kurtosis > 4.

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File URL: http://latienda.ie.edu/working_papers_economia/WP06-24.pdf
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Publisher Info
Paper provided by Instituto de Empresa, Area of Economic Environment in its series Working Papers Economia with number wp06-24.

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Length: 40 pages
Date of creation: Dec 2006
Date of revision:
Handle: RePEc:emp:wpaper:wp06-24

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Related research
Keywords: Coefficient omega; Likert-type items; Reliability;

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This page was last updated on 2009-12-20.

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