xiii, 221 p. : ill., music, forms. A print copy of this title is available through the UO Libraries under the call number: MUSIC MT35 .M87 2006 / The main purpose of the study was to examine the effects of learning songs by ear in multiple keys on skills in playing by ear and sight-reading. Secondary purposes of the study were to explore the effects of instruction on student attitudes, and to consider differential effects due to music aptitude. Students were brass and woodwind musicians ( N =28) in grades 7--8, placed in one of two instructional groups according to music aptitude, instrument, and music background. Time for instruction was three 20-minute lessons per week for four weeks. Students in the experimental group learned songs by ear in the keys of Bb, Db, and G concert, while students in the contact-control group practiced technical exercises in those same keys. Before and after instruction, students performed a well-known melody by ear in the keys of Bb, Db, and G concert, as well as a short etude in each of the three keys. Two adjudicators listened to recorded performances and evaluated pitch accuracy. To assess the effects of instruction on performance, repeated-measures ANOVAs considered the variables of group, time, and key. The experimental group improved significantly in playing by ear in the keys of Db and G concert, p < .001, but not in Bb. The contact-control group did not improve significantly in playing by ear in any of the keys. Both groups improved significantly in sight-reading in all three keys, p < .001. Analyses of qualitative and quantitative data from a researcher-authored attitude survey indicated that students in the experimental group perceived significant improvement in the new keys of Db and G, while students in the contact-control group did not perceive improvement. There were no statistically significant effects of music aptitude on performance achievement or attitude. Whether this was because the sample sizes were too small for the detection of effects, or whether there were no significant effects, is not known. The results of the study suggest that learning songs by ear may benefit student musicians. / Committee in Charge: Dr. Harry E. Price, Chair; Dr. Michael D. Bullis; Dr. Phyllis M. Paul; Dr. Steve Vacchi