r-cran-psy | GNU R procedures for psychometrics | Mehr ...
This package includes several procedures used in psychometrics and scaling, including: . Cohen's Kappa and weighted Kappa (two-rater agreement tests) Cronbach's Alpha (an item-reliability test) Focused Principal Components Analysis Intraclass correlation coefficients Light's Kappa (an N-rater agreement test) Screeplots and graphical representations of principal components