This report discusses the findings of a study that tested the effectiveness of a program that used music to increase the articulation skills of three females and seven males (ages 12-21) with profound mental retardation. Level one of the treatment began with the teacher humming the target word while tapping the rhythm on the hand drum or strumming it on the guitar. Next, both student and teacher hummed and tapped. Finally, the student hummed as the teacher and student tapped rhythms. As soon as the student became comfortable and cooperative with this system, both moved on to level two. At level two, the actual word was added to the other actions. It was proposed that the student progress from listening to unison performance and then to the independent vocalizing of the subject. All students progressed to unison performance and some to independent vocalizing. The 30-minute treatments were given as part of the regular music sessions held twice a week. The program resulted in the improvement of articulation skills and an overall increase in self-confidence. Appendices include a Speech Research Survey, an Articulation Data Sheet, Compilations of Raw Data, and a parent permission form. (Contains 27 references.) (CR)