The first major revision of the Minnesota Multiphasic Personality Inventory - a widely-used clinical personality instrument - was published in 1989. The study described in this book (based on the test results of over 500 patients) addresses the comparability of the new MMPI-2 to the earlier model among chronic pain patients, and provides preliminary research data on the performance of the revised test among the large chronic pain population. It concludes with suggestions for interpretative strategies in assessing chronic pain patients with the MMPI-2, and with recommendations for future research directions.