Effectiveness of a DAF conditioning program for adolescent and adult stutterers

The effectiveness of a 90-hr treatment program with 27 adolescent and adult stutterers was studied. The treatment, conversational rate control therapy, consisted of a conditioning program that employed DAF to establish slow stutter-free speech that was subsequently increased in speed to a normal rate. Stimulus control was then generalized to the everyday environment. Recordings of easy and difficult speaking situations were made before and after treatment. Stuttering was substantially reduced for all clients in the clinic and in everyday speaking situations.