 In the first phase of this study, participants are observed for 4 weeks to identify those most in need of depression-specific treatment. Participants are then exposed to the Problem-Solving Treatment for Primary Care PST-PC, a six-session behavioral treatment for depression. After 4 weeks, patients who do not respond adequately to the treatment are randomly assigned to either continued PST-PC or to usual care for 9 weeks. Participants are followed for 6 months after the study. 