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Task complexity effect on vocal reaction time in aged speakers
1Department of Otolaryngology, New York Medical College, Valhalla 10595, USA.
Journal of Voice : Official Journal of the Voice Foundation
|February 13, 1999
Summary
Aging affects speech production efficiency, increasing vocal reaction time (RT) with task complexity. Aged individuals showed significantly longer vocal RTs for sentences compared to single words.
Area of Science:
- Neuroscience
- Speech Science
- Gerontology
Background:
- Aging is associated with declines in central nervous system (CNS) processes impacting speech.
- Speech communication impairments are common in the elderly population.
- Vocal reaction time (RT) can quantify CNS efficiency in speech production.
Purpose of the Study:
- To investigate the effect of task complexity on vocal RT in young and aged adults.
- To compare vocal RT differences between age groups under varying task demands.
Main Methods:
- Utilized a simple reaction time (RT) paradigm.
- Assessed vocal RT in young and aged participants.
- Manipulated task complexity using single words versus short sentences.
Main Results:
- Aged subjects exhibited a significant increase in vocal RT with greater task complexity.
- The difference in vocal RT between young and aged groups widened as task complexity increased.
- No significant task complexity effect was observed in young subjects.
Conclusions:
- Task complexity significantly impacts vocal production efficiency in older adults.
- Increased vocal RT in aging may stem from altered respiratory mechanics or reduced CNS motor processing efficiency.
- Vocal RT is a sensitive measure for detecting age-related changes in speech motor control.