Confronto tra indici di consistenza interna

Journal title DiPAV - QUADERNI
Author/s Roberto Burro
Publishing Year 2008 Issue 2007/20
Language Italian Pages 10 P. 41-50 File size 157 KB
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In analyses of test data according to traditional test theory, the emphasis is on item and sample statistics calculated in terms of raw score: probably the best known of these statistics are the KR-20, KR-21, Cronbach’s alpha and Split-half indices of internal consistency. In most cases, these index are equal. In contrast, the emphasis in latent trait theory is on item and person parameter estimates and on variances of these estimates. From the point of view of latent trait theory using the Montecarlo method and Rasch simple logistic model, it is shown that KR-20, KR-21, Cronbach’s alpha and Split-half are still equal.

Roberto Burro, Confronto tra indici di consistenza interna in "DiPAV - QUADERNI" 20/2007, pp 41-50, DOI: