The effects of noise and contraction intensity on vigilance performance

Button, Duane C. (2003) The effects of noise and contraction intensity on vigilance performance. Masters thesis, Memorial University of Newfoundland.

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    Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
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Abstract

There were two major objectives for this thesis: 1) to integrate the existing literature based on vigilance, noise, and neuromuscular fatigue and 2) to determine the effects of muscle contraction intensity, neuromuscular fatigue, and noise on the performance of complex and simple vigilance tasks. Vigilance or an individual's state of physiological or psychological readiness to mediate performance when reacting to a stimulus can be affected simultaneously by noise and neuromuscular stimuli. Noise exposure and muscle contraction have been shown to both negatively and positively affect vigilance performance. However, this contradiction may be a result of differences in muscle contraction and noise intensities, durations, and type as well as the complexity of the vigilance task. It was determined in the present experiment that continuous noise at an intensity of 95 dB (A) impairs both simple and to a greater extent complex vigilance task performance. Isometric muscle contractions at 5% and 20% of a maximum voluntary contraction also impaired simple and complex vigilance task performance. There did not seem to be an interaction effect between noise and contraction intensity.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/7512
Item ID: 7512
Additional Information: Includes bibliographical references
Department(s): Human Kinetics and Recreation, School of
Date: 2003
Date Type: Submission
Library of Congress Subject Heading: Vigilance (Psychology); Noise--Physiological effect; Muscle contraction

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