The proposed research will (1) conduct a randomized controlled clinical trial to further validate and confirm the findings from a recently completed pilot project showing that hypnosis is efficacious in reducing pain intensity and pain interference and the improving the quality of life of Veterans suffering from CLBP (see preliminary studies section, below), (2) evaluate the relative importance of home practice of hypnosis, (3) determine if the beneficial effects of hypnosis are long lasting, and (4) determine the predictors of treatment outcome, in particular, hypnotizability (a general and stable trait ability to respond to hypnotic suggestions), but also frequency of practice. In this study, a control condition will be used that is credible to patients, but is known to have only minimal effects on pain.