Poster C26, Sunday, March 26, 5:00 – 7:00 pm, Pacific Concourse
The Effects of Self-Selected Music on Cortical Asymmetries
Trevor C. J. Jackson1, Christine R. Jimenez1, Mark W. Geisler1; 1San Francisco State University
Alpha asymmetry in frontal areas has been found to correlate with emotionally valenced stimuli (Davidson, Ekman, Saron, Senulis, & Friesen, 1990; for review, see Davidson, 1998), including music (Schmidt and Trainor, 2001). Few studies, however, have investigated what might be driving this effect, and whether preference and self-selection can modulate alpha asymmetry. The current study investigated whether self-selected music can modulate alpha asymmetry, and whether affect or arousal ratings were related to higher instances of alpha asymmetry. EEG was collected at bands of interest that included alpha (8-13 Hz), theta (4-8 Hz), and beta (13-30 Hz), and was recorded from Fz, F3, F4, Cz, C3, C4, Pz, P3, and P4. Thirty-two participants (N = 32) chose a personal song that they would rate as most positive, and one song that was rated as most negative. Participants then listened to white noise (as a control) and each musical excerpt (in a counterbalanced order) for 45 seconds. Results indicated that participants showed significantly increased alpha asymmetry in the right hemisphere over time, however no significant differences arose between the selected song and white noise conditions. Additionally, no relationship was detected between affect and arousal ratings and cortical asymmetries. Implications, as well as other studies further investigating the role preference can play on modulating cortical asymmetries, will be discussed.
Topic Area: EMOTION & SOCIAL: Other