Baker Nancy A, Cook James R, Redfern Mark S
Department of Occupational Therapy, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Appl Ergon. 2009 Jan;40(1):136-44. doi: 10.1016/j.apergo.2007.12.008. Epub 2008 Feb 13.
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.
本文描述了一种观察工具——键盘个人电脑使用方式工具（K-PeCS）的评分者间信度、评分者内信度以及同时效度，该工具用于评估与电脑键盘使用相关的刻板姿势和动作。三名经过培训的评分者独立对45名电脑键盘使用者的视频片段进行评分，以确定评分者间信度，然后对15个视频片段的子样本重新评分，以确定评分者内信度。通过将使用K-PeCS获得的评分与从三维运动分析系统得出的分数进行比较，评估同时效度。K-PeCS总体具有出色的信度[评分者间：组内相关系数（ICC）=0.90；评分者内：ICC=0.92]。K-PeCS上的大多数单项具有良好到出色的信度，尽管有六个项目的ICC低于0.75。除两项外，那些接受同时效度评估的K-PeCS项目与运动分析数据相比表现良好。这些结果表明，K-PeCS上的大多数项目可用于可靠地记录电脑键盘使用方式。
