Hos medlemmarna i en professionell kör som först repeterade och sedan hade en föreställning med Beethovens ”Missa Solemnis” steg halterna i deltagarnas saliv av IgA-antikroppar med i genomsnitt 150% under repetitionerna och 240% under föreställningen, medan halterna av stresshormonet cortisol i genomsnitt sjönk med 30% under repetitioner men steg med 37% under föreställningen med publik. (Av Robert Beck med flera, 2000)
Titel: Choral Singing, Performance Perception, and Immune System Changes in Salivary Immunoglobulin A and Cortisol
Författare: Beck, R. J., Cesario, T. C., Yousefi, A., and Enamoto, H
Publikation: Music Perception
Sammandrag: In a naturalistic pre-post design, samples of saliva were collected from the members of a professional chorale during an early rehearsal (n=31), a late rehearsal (n=34) and a public performance (n=32) of Beethoven's Missa Solemnis. As measures of immune system response, mean levels of secretory immunoglobulin A increased significantly, as a proportion of whole protein, 150% during rehearsals and 240% during the performance. Cortisol concentrations decreased significantly an average of 30% during rehearsals and increased 37% during performance. As measured through performance perception rating scales, a group of emotions and other experiential states that singers associated with professional singing were highly predictive of changes in level of secretory immunoglobulin A during the performance condition, but the results for the rehearsal conditions were not significant. The best multiple regression model for performance level of immunoglobulin A (p < .0015) included seven emotional, cognitive, and evaluative variables generally associated with choral singing, including levels of mood before and during singing, stress, relaxation, feeling "high," detachment/engagement, and specific satisfaction with the immediate performance.
Länk till original: http://www.escholarship.org/uc/item/1qf5f7bc