摘要
目的 探讨中文版主观负荷评估法(SWAT)和美国国家航空航天任务负荷指数(NASA-TLX)在评估社区医师脑力负荷中的信度和效度.方法 方便抽样抽取上海市110名社区医师,应用两量表中文版对其进行调查,两量表信度的评估采用内部一致性信度、分半信度及条目分-总分一致性,效度评估采用结构效度、项目区分度及两量表聚合效度.结果 NASA-TLX量表分半信度及Cronbach's α系数分别为0.703、0.619,除自我绩效条目外各条目分-总分相关系数均>0.4(P<0.01).SWAT量表分半信度及Cronbach'sα系数分别为0.647、0.669,各条目分-总分相关系数均>0.4(P <0.01).因子分析显示两量表的结构效度较好,除NASA-TLX量表的自我绩效条目外,两量表各条目的项目区分效度均较好,两量表总分之间的Spearman相关系数0.359 ~0.465 (P <0.01).NASA-TLX量表同时删除自我绩效和受挫程度条目或只删除自我绩效条目的信效度均较原量表高,且前者较后者高.结论 中文版NASA-TLX和SWAT量表在上海市现场临床环境中应用的信度和效度较好,且修改后的NASA-TLX量表特别是删除自我绩效和受挫程度后的量表或可以更好地反映我国社区医师的脑力负荷.
Objective To assess the reliability and validity of Chinese version National Aeronautics and Space Administration Task Load Index (NASA-TLX) and Subjective Work Assessment Technique (SWAT) in evaluating mental workload of community physicians.Methods One hundred and ten community physicians selected by convenience sampling method from Shanghai were recruited.The split-half reliability,Cronbach's α coefficient and Item-total coefficients were adopted to assess the reliability and the validity of Chinese version NASA-TLX and SWAT scales in evaluating the metal workload of participants.Results For NASA-TLX,the Split-Half,Cronbach's α coefficient was 0.703 and 0.619 respectively,all Item-total coefficients (except for performance item) were greater than 0.4 (P < 0.01).For SWAT,the Split-Half,Cronbach's α coefficient of was 0.647 and 0.669 respectively,Item-total coefficients were all greater than 0.4 (P < 0.01).Factor analysis showed that two scales had good structure validity; item discrimination showed satisfactory item validity (except for performance item).The Spearman correlation coefficients between two scales ranged from 0.359 to 0.465 (P < 0.01).Both of the modified versions of NASA-TLX had better reliability and validity than the original one,the one with removed both performance and frustrate item was better than one with removed performance item only.Conclusions The Chinese version NASA-TLX and SWAT can serve as reliable and valid instruments for assessing the community physicians' perception of mental workload in China; and the modified version of NASA-TLX especially the one with removed performance and frustrate item seems to work better than the original one.
出处
《中华全科医师杂志》
2015年第9期686-690,共5页
Chinese Journal of General Practitioners
基金
上海市卫生系统优秀人才培养计划(XBR2013121)
关键词
评价研究
脑力负荷
社区医师
Evaluation studies
Mental workload
Community physician