Comparatal dispersion,a measure of accuracy of judgment

It is suggested that the ambiguity of aset of paired comparison judgments may be measured by the quantity _i² + _j² – 2r_ijii, This quantity is termed thecomparatal dispersion. A simultaneous solution for scale values and ratios of comparatal dispersions has been presented and applied to some data on food preferences.This research was jointly supported in part by Princeton University, the Office of Naval Research under contract Nonr-1858(15), and the National Science Foundation under grant NSF G-642, and in part by Educational Testing Service. Reproduction in whole or in part is permitted for any purpose of the United States Government.