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《Chinese Journal of Ergonomics》 2018-04
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Research on the Reliability and Validity of NASA-TLX as A Measurement of Subjective Fatigue after Vienna Psychological Test

ZHONG Xiao;LI Jian;LIU Zhi-Gang;HUANG Yuan-Chun;Human Factors & Ergonomics Lab,College of Urban Rail Transportation,Shanghai University of Engineering Science;  
The objective of this study is to probe whether the Task Load Index( NASA-TLX) is suitable for assessing the perceived fatigue result from Vienna Psychological Test System( VTS) tests. The experimental samples who are the on-the-job drivers were selected randomly from Shanghai Metro Company,and should finish six test modules,which are closely related to driving work and reflects the characteristics of driver,selected from VTS. In the current research,NASA-TLX scale was employed to evaluate the subjective fatigue owned to VTS tests operation,and the VTS tests performance was regarded as the criterion in order to assess the validity of NASA-TLX scale as an evaluation technique to induced fatigue in VTS testers. Results show that:( 1) NASA-TLX scale,used for evaluating VTS tests operation situation,has shown good internal consistency reliability and construct validity;( 2) Significant correlations of between some factors of NASA-TLX and the performance of VTS test,such as the reaction and attention indexes,show a good criterion validity of NASA-TLX,NASA-TLX scale can serve as a helpful tool to evaluate testers' mental workload,to some extent,access to play an important role in predicting the task performance in the VTS tests. The research results will also provide a reference for the diversified application of NASA-TLX scale and the VTS,as a training tool,applied to driving fatigue research.
【Fund】: 十三五国家重点研发计划子课题(项目编号:2017YFC0804900)
【CateGory Index】: TB18;U298
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