MMPI-2-RF validity scale scores as moderators of substantive scale criterion validity

The current study examined the ability of scores on the MMPI-2-RF overreporting Validity Scales, F-r, Fp-r, Fs, and FBS-r to moderate the criterion validity of scores on the instrument's Restructured Clinical (RC) Scales. These analyses were conducted in four samples: (a) combined college overreporting simulation and control participant sample, (b) outpatients, (c) inpatients, and (d) criminal forensic examinees. Although results were strongest in the college sample, there was evidence that all four Validity Scales moderated RC Scale criterion validity across all four samples, with moderating effects occurring due to both slope and intercept differences. The findings illustrate the utility of the overreporting Validity Scales to serve their purpose: to elevate and help identify when the results of the instrument's substantive scales overestimate the examinee's level of psychopathology. The conceptual meaning of slope and intercept differences in this context is explored and suggestions are made for best statistical practice when examining the ability of validity indices to moderate substantive scale criterion validity.