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Inter-observer reliability of forceful exertion analysis based on video-recordings.

Authors
Bao-S; Howard-N; Spielholz-P; Silverstein-B
Source
Ergonomics 2010 Sep; 53(9):1129-1139
NIOSHTIC No.
20038086
Abstract
The objectives were to examine inter-observer reliability of job-level forceful exertion analyses and temporal agreement of detailed time study results. Three observers performed the analyses on 12 different jobs. Continuous duration, frequency and % time of lifting, pushing/pulling, power and pinch gripping exertions and estimated level of the exertions were obtained. Intraclass correlation coefficient and variance components were computed. Temporal agreement analyses of raw time study data were performed. The inter-observer reliability was good for most job-level exposure parameters (continuous duration, frequency and % time of forceful exertions), but only fair to moderate for the estimated level of forceful exertions. The finding that the between-observer variability was less than the between-exertion variability confirmed that the forceful exertion analysis method used in the present study can detect job exertion differences. Using three observers to perform detailed time studies on task activities and getting consensus of the majority can increase the between-observer agreement up to 97%. STATEMENT OF RELEVANCE: The results inform researchers that inter-observer reliability for job-level exposure measurement of forceful exertion analysis obtained from detailed time studies is generally good, but the observers' ability in the estimation of forceful exertion level can be poor. It also provides information on the temporal agreement of detailed forceful exertion analysis and guidelines on achieving better agreement for studies where accurate synchronisation of task activities and direct physiological/biomechanical measurements is crucial.
Keywords
Ergonomics; Job-analysis; Force; Physical-stress; Manual-lifting; Task-performance; Work-analysis; Biokinetics; Biomechanics; Physiological-measurements; Author Keywords: forceful exertion; inter-rater reproducibility; observation method; temporal agreement; time study
Contact
S. Bao, Safety & Health Assessment & Research for Prevention (SHARP) Program, Washington State Department of Labor and Industries, P.O. Box 44330, Olympia, WA 98504
CODEN
ERGOAX
Publication Date
20100901
Document Type
Journal Article
Email Address
baos235@LNI.WA.GOV
Funding Amount
289069
Funding Type
Cooperative Agreement
Fiscal Year
2010
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U01-OH-007316
Issue of Publication
9
ISSN
0014-0139
Priority Area
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
Source Name
Ergonomics
State
WA
Performing Organization
Washington State Department of Labor and Industries, Olympia, WA
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