1 HE DEVELOPMENT OF musical performance skills is an extremely complex phenomenon. The successful musical performer must have developed his ability to adjust pitches, rhythms, dynamics, and tone quality during performance to a very high degree of accuracy. The professional musician receives auditory feedback when he produces a sound, and he makes adjustments in this sound based on his experience and knowledge of acceptable performance practices. Auditory concepts such as intonation and phrasing, among others, are continuously evaluated by the successful performer during performance. In training the auditory concepts necessary for successful performance, teachers usually are not able to provide meaningful reinforcement to students in terms of acceptable levels of tone adjustment during the students' practice sessions. The neophyte ordinarily does not know whether the tones he produces are acceptable. Students of a variable pitched instrument, for instance, are expected to develop the ability to adjust pitches to the satisfaction of their teachers. A problem exists, however, in developing an efficient means by which these students can refine their concepts of pitch adjustment during practice sessions and utilize cultural idiosyncracies of intonation while actively performing. This pilot study proposed to determine whether continuous visual reinforcement might affect students' tasks of pitch adjustment. The experimental question was designed to determine the feasibility of utilizing accurate and continuous visual cues to develop more accuracy in auditory perceptual tasks such as intonation matching. The research dealt with the reinforcement of intermodal sensory processes (vision and audition) which might affect auditory skill development in music. The basic assumption for the study was as follows: If accurate visual reinforcement seems to aid auditory tasks (simply by providing an added perceptual dimension), this approach may lead to the future visual programing of musical performance concepts. Each teacher could design a series of drill exercises that would provide immediate, accurate, and individualized reinforcement to aid the development of auditory skills. A student could use his visual acuity to reinforce auditory responses. The neo-