I have just updated my R-package to measure agreement, polarization, dispersion — whatever you want to call it — in ordered rating scales to R-Forge. Version 1.40 includes more extensive documentation and a long due update of the package vignette. I’ll push it to CRAN in a moment. Every time I work on this package, it strikes me how many times the ‘problem’ has been solved, how different the approaches are, and sadly how often standard deviations are still used.