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PsicoUSF
Print version ISSN 1413-8271
Abstract
LEDESMA, Rubén; IBANEZ, Gabriel Molina and MORA, Pedro Valero. Internal consistency analysis by means of Cronbachs Alpha: a computer program based on dynamic graphics. PsicoUSF [online]. 2002, vol.7, n.2, pp. 143-152. ISSN 1413-8271.
This paper describes a computer software that provides dynamic graphics to perform internal consistence analysis by means of Cronbachs Alpha. This software, based on Exploratory Data Analysis philosophy and statistical visualization methods, is designed to assist the process of psychological test and scale construction. It allows carry out internal consistency analysis, as well as exploring statistical properties of items, subject responses patterns, and the effect of item deletion and test length increase on reliability coefficient. Comparing with other statistical software, the benefit of this program is to use dynamic graphics complementing statistical output.
Keywords : Cronbachs Alpha; Statistical visualization; Dynamic graphics.