Studies in desensitization—I: The separate effects of relaxation and desensitization

The purpose of the study was to investigate the separate effects of desensitization and relaxation in Wolpe's technique of “systematic desensitization”. Four small groups of spider-phobic, normal subjects were allocated to the following treatments: desensitization with relaxation, desensitization without relaxation, relaxation only, no-treatment controls. The effects of treatment were assessed by subjective reports, avoidance tests and fear estimates. Marked reductions in fear were obtained only in the desensitization-with-relaxation group and it was concluded that the combined effects of relaxation and desensitization are greater than their separate effects.