Eleven female volunteers completed a 6-month treatment program consisting of a 2-month baseline phase, 2 months of biofeedback training (X number of sessions = 12.9), and 2 months of follow-up data collection. Subjects were assigned to one of two treatment groups: skin temperature training or EMG training of the frontalis muscle. Self-report data were gathered by means of the Symptom Severity Scale. Results, which were analyzed according to a 2 X 3 (treatment X phase) split-plot factorial design, indicate a highly significant overall treatment effect (F = 19.32 p less than .001). There was no significant difference between treatments (F = .47) and no significant interaction effect (F = 1.74).

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Endometriosis is a common gynecological disease that causes marked physical and emotional distress in lives of women, resulting in dysmenorrhea, pain, or both throughout the menstrual cycle in over 96% of cases. A multiple case study design (N = 5) was employed to investigate the use of thermal biofeedback in the treatment of pain associated with endometriosis. The majority of participants (4 out of 5) were able to demonstrate mastery over hand temperature through thermal biofeedback. Of those participants, significant reductions in various aspects of pain were observed by the end of the study; one had a significant increase in Life Control; two had reductions in Pain Severity; three had a decrease in Affective Distress; and all 4 demonstrated reduction in Life Interference, as measured by the West Haven-Yale Multidimensional Pain Inventory. This is a preliminary study with a small sample size and without a control sample; hence, the results are considered only as suggestive of the potential use of biofeedback therapy in alleviating pain and associated symptomatology related to endometriosis. Further research is warranted.

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