This study compared the clinical effectiveness of cognitively oriented stress-coping training with and without biofeedback training to biofeedback training only in the treatment of myofascial pain dysfunction (MPDS). These groups were also compared to a fourth treatment consisting of pseudo-biofeedback plus stress-coping training. Subjects were 32 adults suffering from MPDS who had failed to previously profit from other treatments. Subjects averaged 33.5 years of age and 58.7 months of myofascial pain. Treatement consisted of 10 individual sessions over a five-week period. Stress-coping training was designed to teach subjects to monitor their congitive responses to stress-eliciting situations and to learn cognitive coping skills. Biofeedback training was designed to provide relaxation skills that would enable subjects to reduce masseter muscle tension (EMG). Subjects receiving pseudo-biofeedback training did not receive veridical feedback training.