<qa>  What is the most effective control group to determine?It is well documented that living with HIVAIDS can cause a great amount of stress, and evidence suggests that stress may hasten HIV disease progression by increasing viral replication and suppressing the immune response. Stress management intervention studies using more complex combinations of cognitive and relaxation therapies have shown improvements in both psychological and physiological measures in HIV infected persons. However, no studies have focused on only one intervention or have addressed the spiritual component using a comparable control group to determine which of these interventions is most effective. 