This study examined the treatment utility of the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) as an aid in treatment planning. Treatment utility in the context of treatment planning refers to the degree to which pretreatment assessment is shown to contribute to beneficial therapeutic outcome (Hayes et aI., 1987). In the present study, archival data were examined for 56 clients in an outpatient university training clinic. Matched pairs were identified in which one of the clients received the MMPI-2 during the early portion of therapy, and the other client did not receive the measure at any time. Upon comparing treatment outcomes for the two groups, there were no significant differences in symptom reduction between clients who did and did not complete pretreatment assessment with the MMPI-2. This result is consistent with a general lack of evidence for the treatment utility of the MMPI in previous research. Future research might best consider whether client or situational variables moderate any treatment utility of MMPI-2 data.
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