3/9/2024 0 Comments Buku panduan spss pdfCTT functions include percentage correct, observed scores for each item category, item-total correlations, item-rest correlations (with user-specified confidence intervals), item-rest point biserial/polyserial correlations, Cronbach’s alpha, alpha-if-deleted, and full Pearson correlation matrix (item matrix) with levels of statistical significance. In addition, there is an increasing number of packages for R that can be found in the CRAN Task View: Psychometric Models and Methods Classical test theory Ĭlassical test theory is an approach to psychometric analysis that has weaker assumptions than item response theory and is more applicable to smaller sample sizes.Īutopsych is a free and open-source web app with multiple features for conducting Classical Test Theory (CTT) and Rasch modelling.
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