Participants are assessed pretreatment, after 12 weeks, posttreatment, and 3 and 6 months posttreatment. The severity of depressive symptomatology is measured and a self-report Beck Depression Inventory is administered. At the end of the study and at the follow-up intervals, participants are given the Longitudinal Interval Follow-up Evaluation, an instrument that assesses the severity of depression and dysthymia symptoms.