Patients are evaluated at 4 times, before treatment, after treatment, and at a 6 month and 12 month intervals. An interview version of the Selves Questionnaire is used to measure self-discrepancies. Pain behaviors are assessed by means of structured observation involving videotaping. Other outcome measures include questionnaires for depression, psychosocial disability, physical disability, and cognitive, affective, motivational, and physiological areas of depressive symptomology.