To investigate the effects of stuttering therapy involving the avoidance reduction - anxiety reduction approach, a study was conducted with 16 adult stutters who received group and individual therapy for two evenings a week for nine months. Evaluations were made nine months prior to therapy, at the beginning and end of therapy, and nine months after the close of the treatment. Results indicated that the more severe stutterers showed improvement during therapy but regressed slightly during the followup period, while those subjects with a less severe handicap maintained their improvement during the followup period. Since the progress of the subjects was not statistically significant, it was concluded that modifications of the therapy program were necessary for more effective and lasting results. The various testing devices revealed certain changes in areas of personality and attitudes, but showed no change in speech associated anxiety. (RD)