A considerable amount of research has been directed towards the relationships between physiological reactions and affective or evaluative responses to music. The most frequently used measure for these physiological reactions has been the GSR, but results are often confusing or contradictory. Phares (1934) concluded that the GSR was not particularly useful in this type of research, while Henkin (1957) found clear-cut relationships between the GSR and the rhythmic and familiarity variables. There was no significant correlation, however, between the GSR and musical style, composition, or orchestration. Traxel & Wride (1959) used three types of music and reported that GSR reactions were strongest to jazz selections but no significant correlations between preferences and the GSR were found, and they accounted for this discrepancy on the basis of conventional group values. The present investigation was an attempt to study the relationships between emotional responses and physiological reactions to musieal selections using two measures of the physiological reactions, the GSR and breathing amplitude, and to use a wider variety of stimuli than typieally have been used. To determine if general personality variables or response tendencies may partially account for the confusion in this area, measures of extroversion-introversion also were inc1uded. SUBJECTS Subjects included nine male and 10 fern ale undergraduate students enrolled in a course in clinical psychology at Sacramento State College. Their ages ranged from 21 to 41 years with a mean age of 23.5 years. All Ss volunteered for the study and were naive regarding its methods and purposes. Differences in age and sex between the extrovert-introvert groups were negligible. APPARATUS The apparatus consisted of a three-channel, single-speed Associated Research Incorporated polygraph, Model 6308, on wh ich the GSR and respiration reactions were recorded. The musical selections were presented in a sound-deadened room with aSony, Model TC-530, stereophonie tape recorder through Sharpe. Model MA-9, stereophonie headphones. The musical selections. listed in their randomly predetermined order of presentation, included: (I) Prokofiev's "Le Prince et la Princesse," performed by the London Symphony Orchestra; (2) "Loch Rannock" and "The Seige of Delhi," performed by the Royal Highland Regiment; (3) "Ira Hayes," by Johnny Cash; (4) Bartok's "String Quartet No. 2 opus 17," performed by the Fine Arts Quartet; (5) "Crystal Ship," by The Doors: (6) "Societies' Child," by Janice lan; and (7) "Within You Without You," by the Beatles. PROCEDURE Subjects were tested individually with the Maudsley Personality Test (1962) immediately prior to the experimental situation. Introverts were defmed by a score of 0 to 24, ambiverts by a score of 25 to 33, and extroverts by a score of 34 to 48. After the apparatus were connected and the physiological reactions were stabilized, each S was instructed to listen to the music and rate it on a form provided in terms of the music's affective reaction on hi...