A "fair" comparison of progressive and imaginal relaxation.

Progressive and imaginal relaxation-training procedures are difficult to compare because the latter takes many forms. In this study, an imaginal procedure was used that closely followed progressive operations except that muscle tension was imagined rather than experienced. The dependent variable was the total score on the Relaxation Inventory. College students were placed in groups (ns = 50) high and low on suggestibility based on scores on the Creative Imagination Scale, assigned in equal numbers to the imaginal and progressive relaxation conditions and given four sessions of relaxation training. The pre- and posttrials effects were significant within each of the four training sessions. There were no significant differences in reports of relaxation by the progressive and imaginal treatments. The expected cumulative effect of relaxation training across the four sessions was not found; in fact, the imaginal condition showed a significant decrease. The only significant suggestibility effect was an interaction between suggestibility and trials in which highly suggestible subjects reported less pre-session relaxation. These results are consistent with reports of no differences between progressive and imaginal relaxation training.