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Rater reliability and concurrent validity of the Keyboard Personal Computer Style instrument (K-PeCS).

Authors
Baker-NA; Cook-JR; Redfern-MS
Source
Appl Ergon 2009 Jan; 40(1):136-144
NIOSHTIC No.
20034915
Abstract
This paper describes the inter-rater and intra-rater reliability, and the concurrent validity of an observational instrument, the Keyboard Personal Computer Style instrument (K-PeCS), which assesses stereotypical postures and movements associated with computer keyboard use. Three trained raters independently rated the video clips of 45 computer keyboard users to ascertain inter-rater reliability, and then re-rated a sub-sample of 15 video clips to ascertain intra-rater reliability. Concurrent validity was assessed by comparing the ratings obtained using the K-PeCS to scores developed from a 3D motion analysis system. The overall K-PeCS had excellent reliability [inter-rater: intra-class correlation coefficients (ICC)=.90; intra-rater: ICC=.92]. Most individual items on the K-PeCS had from good to excellent reliability, although six items fell below ICC=.75. Those K-PeCS items that were assessed for concurrent validity compared favorably to the motion analysis data for all but two items. These results suggest that most items on the K-PeCS can be used to reliably document computer keyboarding style.
Keywords
Posture; Ergonomics; Biomechanics; Models; Biomechanics; Biomechanical-modeling; Skeletal-movement; Statistical-analysis; Mathematical-models; Computer-equipment; Computers; Equipment-design; Equipment-operators; Author Keywords: VDT evaluation; MSD-UE; Instrument development
Contact
Nancy A. Baker, Department of Occupational Therapy, University of Pittsburgh, 5012 Forbes Tower, Pittsburgh, PA 15260
CODEN
AERGBW
Publication Date
20090101
Document Type
Journal Article
Email Address
nab36@pitt.edu
Funding Type
Grant
Fiscal Year
2009
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-007826
Issue of Publication
1
ISSN
0003-6870
Source Name
Applied Ergonomics
State
PA
Performing Organization
University of Pittsburgh
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