This function calculates Berry and Mielke's IOV, a measure of dispersion based on squared Euclidean distances. This function follows the presentation by Blair and Lacy 2000, but includes the adjustment for Tmax omitted by Blair and Lacy. The derived measure COV by Kvalseth is implemented as Kvalseth. Usually, the IOV is equivalent to 1-lsquared.
References
Blair, J., and M. Lacy. 2000. Statistics of Ordinal Variation. Sociological Methods & Research 28 (3): 251-280.