An examination of the stability of the MMPI Personality Disorder Scales.

Recently, a set of Minnesota Multiphasic Personality Inventory (MMPI) scales for the diagnosis of personality disorders have attracted research attention. As personality disorders are thought to represent long-standing trait disturbances, any measure of these disorders should be stable over time and relatively free from state influences. This study investigated the stability of the MMPI scales in 67 subjects across a brief inpatient treatment for substance abuse. The results indicated high levels of stability across the 3-week treatment period.