The purpose of this experiment is therefore (1) to design a test to measure the skill of a heterogeneous group of college music students and (2) to administer and evaluate an aural training program which could be used to develop efficiently aural intelligence. The students used in this experiment were intentionally chosen with varying abilities in order to permit comparisons. A careful record was kept of their ages, musical experiences, major instruments (voice, piano, violin, and other orchestral instruments), amount of training, skill and technique, and theory grades.