This package describes a procedure of reducing items in a rating scale. It was published in the refence included in this description. The method was proposed by Waldemar W. Koczkodaj and published by a sizable collboration coordinated by him.
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2. T. Kakiashvili, W. W. Koczkodaj, and M. Woodbury-Smith. Improving the medical scale predictability by the pairwise comparisons method: Evidence from a clinical data study. Computer Methods and Programs in Biomedicine, 105(3), 2012 DOI: http://dx.doi.org/10.1016/j.cmpb.2011.09.011
3. X. Robin, N. Turck, A. Hainard, N. Tiberti, F. Lisacek, J.-C. Sanchez, and M. Muller. proc: an opensource package for r and s+ to analyze and compare roc curves. BMC Bioinformatics, 2011 https://bmcbioinformatics.biomedcentral.com/articles/10.1186/1471-2105-12-77
4. R. DeLong, D. M. DeLong, and D. L. Clarke-Pearson. Comparing the areas under two or more correlated receiver operating characteristic curves: a nonparametric approach. Biometrics, 1988