MMPI profiles of chronic pain patients: some methodological considerations that concern clusters and descriptors.

Significant methodological problems in the identification of MMPI subtypes in patients with chronic pain are addressed, and some illustrative data are offered. Particular attention is given to the selection of MMPI predictor data, determination of membership in a subtype, and the selection of nontest descriptors. Some recommendations for improving the predictive validity of statements about the personality and behavioral characteristics of patients with chronic pain from the MMPI are made.