Schinka, Kinder, and Kremer developed "validity" scales for the "Revised NEO Personality Inventory" (NEO PI-R; Costa & McCrae) to detect underreporting--the Positive Presentation Management (PPM) Scale and overreporting--the Negative Presentation Management (NPM) Scale. In this investigation, the clinical utility of these scales was examined using the established validity scales from the "Minnesota Multiphasic Personality Inventory-2" (MMPI-2; Butcher et al.) as the referent. The sample was composed of 370 psychiatric patients who completed the NEO PI-R and the MMPI-2 as part of a routine evaluation. Results indicated that response distortion compromised the utility of the NEO PI-R domain scales. Moreover, the PPM and NPM scales and an NPM-PPM index significantly differentiated invalid under-and overreporting groups from a valid responding group. The PPM and NPM-PPM index were adequate in classifying under- and overreporters, respectively. (Contains 5 tables and 4 notes.)