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. The derived measure COV by Kvalseth is implemented as Kvalseth.
References
Blair, J., and M. Lacy. 2000. Statistics of Ordinal Variation. Sociological Methods & Research 28 (3): 251-280.