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An evaluation of vibration and other...

McDowell, Thomas W.

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An evaluation of vibration and other effects on the accuracy of grip and push force recall.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	An evaluation of vibration and other effects on the accuracy of grip and push force recall./
Author:	McDowell, Thomas W.
Description:	151 p.
Notes:	Adviser: Steven F. Wiker.
Contained By:	Dissertation Abstracts International67-06B.
Subject:	Engineering, Industrial. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3225379
ISBN:	9780542764554

An evaluation of vibration and other effects on the accuracy of grip and push force recall.
McDowell, Thomas W.

An evaluation of vibration and other effects on the accuracy of grip and push force recall. - 151 p.

Adviser: Steven F. Wiker.

Thesis (Ph.D.)--West Virginia University, 2006.

Operators of vibratory hand tools can be at risk of developing health problems associated with repeated forceful actions and exposure to intense hand-transmitted vibration. To better assess health risks, comprehensive risk evaluations of these tasks must include quantitative assessments of hand-tool coupling forces. Researchers have used instrumentation for such measurements; but those techniques may be ill-suited for certain field environments. Psychophysical force-recall techniques have been proposed as alternatives to handle instrumentation. This study comprised two experiments that examined the effects of vibration and other factors upon force-recall accuracy and reliability. In each experiment, participants applied specific grip and push forces to an instrumented handle mounted on a shaker system. Participants were exposed to sinusoidal vibration at frequencies that ranged from 0 Hz to 250 Hz. Three levels of applied force and two levels of vibration magnitude were examined. During the vibration exposure period, participants were provided with visual feedback while they attempted to "memorize" their applied grip and push forces. Following vibration exposure and a rest period, participants tried to duplicate the hand forces without visual feedback. Vibration frequencies, magnitudes, and hand force levels were randomized from trial to trial. To evaluate test-retest reliability, the test was repeated on a later day with each participant. Participants overestimated grip and push forces. Depending on exposure conditions, error means ranged from 2 N to 10 N. The ANOVA revealed that force-recall errors for exposures between 31.5 Hz and 63 Hz were significantly higher than those at other vibration frequencies. Errors were greater when participants were exposed to the higher vibration magnitude when compared with the lower vibration magnitude. The average error for females was significantly less than that for males. The effects of force level were mixed. This method demonstrated strong test-retest reliability as correlations for all but one participant were found to be significant. Overall, recalled force errors were relatively small over the range of operationally-relevant hand-handle coupling forces and vibration exposure conditions. This force-recall technique shows promise as an alternative to expensive and fragile force-sensing instrumentation.

ISBN: 9780542764554Subjects--Topical Terms:

626639
Engineering, Industrial.

An evaluation of vibration and other effects on the accuracy of grip and push force recall.
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005 20110915
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020 $a 9780542764554
035 $a (UMI)AAI3225379
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040 $a UMI $c UMI
100 1 $a McDowell, Thomas W. $3 1291646
245 1 3 $a An evaluation of vibration and other effects on the accuracy of grip and push force recall.
300 $a 151 p.
500 $a Adviser: Steven F. Wiker.
500 $a Source: Dissertation Abstracts International, Volume: 67-06, Section: B, page: 3376.
502 $a Thesis (Ph.D.)--West Virginia University, 2006.
520 $a Operators of vibratory hand tools can be at risk of developing health problems associated with repeated forceful actions and exposure to intense hand-transmitted vibration. To better assess health risks, comprehensive risk evaluations of these tasks must include quantitative assessments of hand-tool coupling forces. Researchers have used instrumentation for such measurements; but those techniques may be ill-suited for certain field environments. Psychophysical force-recall techniques have been proposed as alternatives to handle instrumentation. This study comprised two experiments that examined the effects of vibration and other factors upon force-recall accuracy and reliability. In each experiment, participants applied specific grip and push forces to an instrumented handle mounted on a shaker system. Participants were exposed to sinusoidal vibration at frequencies that ranged from 0 Hz to 250 Hz. Three levels of applied force and two levels of vibration magnitude were examined. During the vibration exposure period, participants were provided with visual feedback while they attempted to "memorize" their applied grip and push forces. Following vibration exposure and a rest period, participants tried to duplicate the hand forces without visual feedback. Vibration frequencies, magnitudes, and hand force levels were randomized from trial to trial. To evaluate test-retest reliability, the test was repeated on a later day with each participant. Participants overestimated grip and push forces. Depending on exposure conditions, error means ranged from 2 N to 10 N. The ANOVA revealed that force-recall errors for exposures between 31.5 Hz and 63 Hz were significantly higher than those at other vibration frequencies. Errors were greater when participants were exposed to the higher vibration magnitude when compared with the lower vibration magnitude. The average error for females was significantly less than that for males. The effects of force level were mixed. This method demonstrated strong test-retest reliability as correlations for all but one participant were found to be significant. Overall, recalled force errors were relatively small over the range of operationally-relevant hand-handle coupling forces and vibration exposure conditions. This force-recall technique shows promise as an alternative to expensive and fragile force-sensing instrumentation.
590 $a School code: 0256.
650 4 $a Engineering, Industrial. $3 626639
650 4 $a Health Sciences, Occupational Health and Safety. $3 1017799
650 4 $a Psychology, Industrial. $3 520063
650 4 $a Psychology, Psychometrics. $3 1017742
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710 2 0 $a West Virginia University. $3 1017532
773 0 $t Dissertation Abstracts International $g 67-06B.
790 $a 0256
790 1 0 $a Wiker, Steven F., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3225379