本文研究NASA-TLX(National Aeronautics and Space Administration-Task Load Index,美国国家宇航局任务负荷指数)量表对VTS(Vienna Psychological Test System)测试产生的主观疲劳感进行评估的有效性和适用性。实验选取上海地铁驾驶...本文研究NASA-TLX(National Aeronautics and Space Administration-Task Load Index,美国国家宇航局任务负荷指数)量表对VTS(Vienna Psychological Test System)测试产生的主观疲劳感进行评估的有效性和适用性。实验选取上海地铁驾驶员样本完成VTS测试模块,数据分析结果表明:(1)用NASA-TLX量表作为测量手段来评估VTS测试任务产生的心理负荷,结果表现出良好的信度和效度水平;(2)NASA-TLX量表的心理和体力需求维度与VTS测试中反应力和注意力绩效之间表现出显著相关性,证明量表具有的可靠准则关联效度,并可以一定程度上定性地对绩效表现做出预测判断。本文研究结果可为NASA-TLX量表的多样化应用和驾驶疲劳研究提供参考。展开更多
Subjective scales have different kinds of applicability in diverse fields.This study intends to implement a quantitative approach to determine the applicability of subjective scales in manual as-sembly work and evalua...Subjective scales have different kinds of applicability in diverse fields.This study intends to implement a quantitative approach to determine the applicability of subjective scales in manual as-sembly work and evaluate the cognitive load of assembly workers.A multi-scale research paradigm based on subjective evaluation method is proposed.Three typical task stages are extracted from the process of assembly work.The National Aeronautics and Space Administration Task Load Index(NASA-TLX)scale,PAAS scale and Workload Profile Index Ratings(WP)scale are selected for the design of 3×3 multi-factor mixed experiment.The power spectrum density(PSD)characteris-tics of electroencephalogram(EEG)are utilized to identify the difficulty levels of the three task sta-ges.The relevant indicators of scale applicability are assessed.The results show that in terms of sensitivity,NASA-TLX scale reaches the highest sensitivity(F=999.137,P=0<0.05).In terms of validity,NASA-TLX scale possesses the best concurrent validity(P=0.0255<0.05).In terms of diagnosticity,NASA-TLX scale based on 6 dimensions takes on the best diagnostic performance.In terms of subject acceptability,WP scale performs the worst.According to the analytic hierarchy process(AHP)model,the applicability scores of NASA-TLX scale,PAAS scale and WP scale are determined as 3,2.55 and 1.6714,respectively.Therefore,NASA-TLX scale is regarded as the most suitable subjective evaluation questionnaire for assembly workers,which is also an effective quantitative evaluation method for the cognitive load of assembly workers.展开更多
文摘本文研究NASA-TLX(National Aeronautics and Space Administration-Task Load Index,美国国家宇航局任务负荷指数)量表对VTS(Vienna Psychological Test System)测试产生的主观疲劳感进行评估的有效性和适用性。实验选取上海地铁驾驶员样本完成VTS测试模块,数据分析结果表明:(1)用NASA-TLX量表作为测量手段来评估VTS测试任务产生的心理负荷,结果表现出良好的信度和效度水平;(2)NASA-TLX量表的心理和体力需求维度与VTS测试中反应力和注意力绩效之间表现出显著相关性,证明量表具有的可靠准则关联效度,并可以一定程度上定性地对绩效表现做出预测判断。本文研究结果可为NASA-TLX量表的多样化应用和驾驶疲劳研究提供参考。
基金the National Natural Science Foundation of China(No.51775325)the Joint Funds of the National Natural Science Foundation of China(No.U21A20121)+1 种基金the Key Research and Development Program of Ningbo(No.2023Z218)the Young Eastern Scholars Program of Shanghai(No.QD2016033).
文摘Subjective scales have different kinds of applicability in diverse fields.This study intends to implement a quantitative approach to determine the applicability of subjective scales in manual as-sembly work and evaluate the cognitive load of assembly workers.A multi-scale research paradigm based on subjective evaluation method is proposed.Three typical task stages are extracted from the process of assembly work.The National Aeronautics and Space Administration Task Load Index(NASA-TLX)scale,PAAS scale and Workload Profile Index Ratings(WP)scale are selected for the design of 3×3 multi-factor mixed experiment.The power spectrum density(PSD)characteris-tics of electroencephalogram(EEG)are utilized to identify the difficulty levels of the three task sta-ges.The relevant indicators of scale applicability are assessed.The results show that in terms of sensitivity,NASA-TLX scale reaches the highest sensitivity(F=999.137,P=0<0.05).In terms of validity,NASA-TLX scale possesses the best concurrent validity(P=0.0255<0.05).In terms of diagnosticity,NASA-TLX scale based on 6 dimensions takes on the best diagnostic performance.In terms of subject acceptability,WP scale performs the worst.According to the analytic hierarchy process(AHP)model,the applicability scores of NASA-TLX scale,PAAS scale and WP scale are determined as 3,2.55 and 1.6714,respectively.Therefore,NASA-TLX scale is regarded as the most suitable subjective evaluation questionnaire for assembly workers,which is also an effective quantitative evaluation method for the cognitive load of assembly workers.