A relationship of selected hemodynamic functions to subjective's seating comfort evaluations has been observed. Studies were conducted using rating scales, subjective probabilities, adjective check lists and concurrent measures of hemodynamics variations with a representative driver population to develop reliable psychophysiological indices of comfort. Thirty-two variables constituted the data bank subjected to multivariate canonical correlation analyses. Subjective data were composed with physiological data and SAE Seat dimensions. Significant relationships among subjective and physiologic measures were found.