Diagnosticity and multidimensional subjective workload ratings
Diagnosticity and multidimensional subjective workload ratings
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DOI：
10.1080/00140139608964470
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发表时间：
1996-03-01
期刊：
影响因子：
2.4
通讯作者：
Velaquez, VL
中科院分区：
文献类型：
--
作者：
Tsang, PS;Velaquez, VL
介绍了一种新的多维主观负荷评估工具-受试者分别（单任务）和同时（双任务）进行两项实验室任务。多维程序比较以及与单维程序的敏感性任务的要求，并行效度与性能，重测信度。结果表明，主观的工作量概况对绩效的预测价值有限。然而，典型分析的结果表明，多维评级提供的诊断信息的性质的任务要求。此外，诊断信息与先验任务表征一致。这有力地支持了这样一种观点，即精神负荷是多方面的，受试者能够报告对单独工作负荷维度的需求。心理负荷模型和评估方法的实际影响的理论意义进行了讨论。
A new multidimensional subjective workload assessment instrument-Workload Profile-was introduced and evaluated against two unidimensional instruments-Bedford and Psychophysical scaling. Subjects performed two laboratory tasks separately (single task) and simultaneously (dual task). The multidimensional procedure compared well with the unidimensional procedures in terms of sensitivity to task demands, concurrent validity with performance, and test-retest reliability. The results suggested that the subjective workload profiles would only have limited predictive value on performance. However, results of the canonical analysis demonstrated that the multidimensional ratings provided diagnostic information on the nature of task demands. Further, the diagnostic information was consistent with the a priori task characterization. This strongly supports the notion that mental workload is multidimensional and that subjects are capable of reporting the demands on separate workload dimensions. Theoretical implications on mental workload models and practical implications on the assessment approaches are discussed.