The experience of pain has cognitive and emotional components as well as sensory and physical factors; hence, psychological variables often play a key role in the control of pain (2) . Recent reviews ( 4 ) have shown the effectiveness of procedures such as cognitive modification, hypnosis, and relaxation training for increasing subjects' tolerance of laborstory pain, e.g., cold-pressor stimulation. In the present investigation, we sought to determine the effectiveness of one of these procedures, relaxation training, as a method for coping with the dinicaL pain which follows surgery. Subjects were 26 women, ages 30 to 62 yr., who were scheduled to undergo vaginal hysterectomies. Subjects were randomly assigned to either experimental or control groups. During the 10-day periods prior to their scheduled operations, the 13 women in the experimental group each received two 90-min, individual sessions of training in progressive muscle relaxation. The relaxation procedures involved ( a ) instructions to focus attention on pleasant, relatively monotonous internal feelings, e.g., deep breathing, and ( b ) systematic tension-release of gross muscle systems; see Bernstein and Borkovec ( 1 ) for detailed instructions. In keeping with ethical guidelines, the investigators informed subjects that the use of relaxation for pain control was an experimental procedure and, as such, its effectiveness could not be guaranteed. Subjects were instructed to practice the relaxation exercises twice daily and to use them as a means of coping with post-operative pain. In the control group were 13 women who underwent vaginal hysterectomies but had no contact with the experimenters prior to surgery. Subjects' pain was assessed one and three days post-operatively via the following dependent measures: (a) subjects' self-reports of pain, i.e., the McGill-Melzack Pain Questionnaire, ( b ) behavioral observations made by two independent raters, i.e., the Chambers-Price Rating Scales for Pain, and (c) the number of pain medications received by the subject. Statistical analyses showed that differences between the experimental and control groups on the dependent measures were not significant at either one or three days following subjects' surgeries (ps > .05); see Petri ( 3 ) for details regarding design, analysis, and a discussion of the results. Relaxation training was not sufficient procedure for the reduction of clinical pain, perhaps as a result of ( a ) insufficient training in the relaxation procedures, ( b ) a lack of staff reinforcement for subjects' post-operative use of the relaxation exercises, and ( c ) the ready availability of alternative, easier methods of pain control, e.g., medication.
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