The overall aim of this program of research is to test a newly developed intervention, Acceptance-Based Behavior Therapy (ABBT), to improve HIV patients' commitment to medical care.

The purpose of the proposed project is to establish the efficacy of ABBT and examine its mechanisms of action. To achieve the specific aims, the investigators will conduct a randomized clinical trial (n = 270), with two treatment arms: ABBT vs. an attention-matched HIV education control condition.

Note: This study is closed for recruitment.