Validation of ratio scales of opinion by multimodality matching

Ss adjusted loudness and force of handgrip (and in one experiment apparent duration) to match the strength of their opinions regarding racism, occupational desirability, and pronunciability of trigrams. For each stimulus item, median settings of one continuum were plotted as a function of median settings of the other. The resulting power-function exponents agree with previous cross-modality matches and with the results of a cross-modality match of loudness and duration produced by Ss in the present experiments. The results provide validation of ratio scales of opinion and further establish the direct scalingmethods used to obtain them.