Further Evidence regarding the R Scale of the MMPI as a Measure of Acquiescence

Abstract

High- and low-scoring groups on the R scale of the MMPI were selected For each group the mean probability of a True response, P(T), on 26 scales was obtained. The social desirability scale values of the items increased from scale to scale. On all 26 scales, low scorers on the R scale had a higher mean probability of a True response than high scorers. The regression lines of P(T) on SDSV for the two groups had approximately the same slopes and differed only in terms of their intercepts. The study was replicated with three additional samples and comparable results were obtained in each case.