ERIC Number: EJ983920
Record Type: Journal
Publication Date: 2012-Jun
Pages: 15
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-1092-4388
EISSN: N/A
Vocal Function in Introverts and Extraverts during a Psychological Stress Reactivity Protocol
Dietrich, Maria; Verdolini Abbott, Katherine
Journal of Speech, Language, and Hearing Research, v55 n3 p973-987 Jun 2012
Purpose: To examine the proposal that introversion predictably influences extralaryngeal and vocal behavior in vocally healthy individuals compared with individuals with extraversion and whether differences are of a nature that may support a risk hypothesis for primary muscle tension dysphonia. Method: Fifty-four vocally healthy female adults between the ages of 18 and 35 years were divided into 2 groups: introversion (n = 27) and extraversion (n = 27). All participants completed a psychological stress reactivity experiment. Before, during, and after the stressor (public speaking), participants were assessed on extralaryngeal muscle activity (surface electromyography: submental, infrahyoid; control site: tibialis anterior), perceived vocal effort, and vocal acoustics (fundamental frequency and intensity). Results: Participants in the introversion group exhibited significantly greater infrahyoid muscle activity throughout the protocol and during perceived stress than participants in the extraversion group. For both groups, perceived vocal effort significantly increased during stress, and acoustic measures significantly decreased. Infrahyoid muscle activity during the stress phase was significantly correlated with introversion and Voice Handicap Index scores but not with vocal effort scores. Conclusions: The data provided evidence of distinct differences in extralaryngeal behavior between introverts and extraverts. The findings are consistent with the trait theory of voice disorders (Roy & Bless, 2000).
Descriptors: Extraversion Introversion, Human Body, Public Speaking, Stress Variables, Females, Adults, Predictive Measurement, Acoustics, Experiments, Speech Communication, Comparative Analysis, Risk Assessment, At Risk Persons, Correlation, Voice Disorders
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail: subscribe@asha.org; Web site: http://jslhr.asha.org
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A