McGlinchey, E. L., Talbot, L. S., Chang, K. H., Kaplan, K. A., Dahl, R. E., & Harvey, A. G. (2011). The effect of sleep deprivation on vocal expression of emotion in adolescents and adults. Sleep, 34(9), 1233-41.
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Abstract
Study Objective
Investigate the impact of sleep deprivation on vocal expression of emotion.
Design
Within-group repeated measures analysis involving sleep deprivation and rested conditions.
Setting
Experimental laboratory setting.
Patients and Participants
Fifty-five healthy participants (24 females), including 38 adolescents aged 11-15 y and 17 adults aged 30-60 y.
Interventions
A multimethod approach was used to examine vocal expression of emotion in interviews conducted at 22:30 and 06:30. On that night, participants slept a maximum of 2 h.
Measurements and Results
Interviews were analyzed for vocal expression of emotion via computerized text analysis, human rater judgments, and computerized acoustic properties. Computerized text analysis and human rater judgments indicated decreases in positive emotion in all participants at 06:30 relative to 22:30, and adolescents displayed a significantly greater decrease in positive emotion via computerized text analysis relative to adults. Increases in negative emotion were observed among all participants using human rater judgments. Results for the computerized acoustic properties indicated decreases in pitch, bark energy (intensity) in certain high frequency bands, and vocal sharpness (reduction in high frequency bands > 1000 Hz).
Conclusions
These findings support the importance of sleep for healthy emotional functioning in adults, and further suggest that adolescents are differentially vulnerable to the emotional consequences of sleep deprivation.
Keywords
Sleep deprivation; adolescents; negative emotion; positive emotion; vocal expression
MeSH Terms
Adolescent
Adult
Age Factors
Child
Expressed Emotion*
Female
Humans
Judgment
Male
Middle Aged
Sleep Deprivation/complications*
Sleep Deprivation/psychology*
Speech Acoustics
Verbal Behavior*
Voice Quality*
Young Adult
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