The F scale contains items of unusual or severe pathology that are infrequently endorsed by most people. It is commonly thought of as an unsophisticated attempt to appear healthier than one might actually be (i.e., faking good). The L scale was designed to identify respondents who attempt to minimize pathology to the extent that they deny even minor faults to which most individuals will admit. The MMPI-2 validity scales are the Lie (L), Infrequency (F), correction (K), Variable Response Inventory (VRIN), True Response Inventory (TRIN), and F back (F B) scales. The addition of these scales helps sharpen and individualize the clinical interpretation of the MMPI-2 results. Groups of items that have been shown to reliably differentiate two or more samples or populations can be added to the MMPI-2 as a clinical or supplemental scale. This is made possible by the empirical keying method described earlier. An interesting feature of the MMPI-2 is that over 300 “new” or experiential scales have been developed for the test over the years. A T-score of 65 or greater indicates clinically significant psychopathology on the MMPI-2.

MMPI raw scores are transformed into standardized T-scores where the mean is 50 and the SD is 10. 9 The MMPI-2 contains 10 clinical scales that assess major categories of psychopathology and six validity scales designed to assess test-taking attitudes. 8 As mentioned earlier, the MMPI was designed to both separate subjects into “normals” and “abnormals,” and to subcategorize the abnormal group into specific classes. The Minnesota Multiphasic Personality Inventory–2 (MMPI-2) is a 567-item true/false, self-report test of psychological function.

Stern MD, in Massachusetts General Hospital Comprehensive Clinical Psychiatry, 2016 The Minnesota Multiphasic Personality Inventory–2

Reliability and validity of mmpi-2