A Multiple Processing Resource Explanation of the Subjective Dimensions of Operator Workload.
ILLINOIS UNIV AT URBANA ENGINEERING-PSYCHOLOGY RESEARCH LAB
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Multiple measures of operator workload may dissociate, or fail to agree, for a given task. The goal of this study was to determine which task difficulty workload as indexed by attentional resource demand could explain the attendant variance in a second index of workload, subjective ratings. A multiple resource model of processing resources Wickens, 1980 guided construction of tasks of differential resource demand. These tasks were both performed by subjects and rated according to workload similarity. Scaling and clustering analyses of the similarity data produced subjective dimensionsclusters of workload that were explained in terms of resource demand, task structure, and task characteristics. Data collected to support this analysis - task performance, physiological measures of heart period variability, effort ratings - revealed three primary dissociations. These dissociations were explained by using the parameters of Wickens multiple resource theory.
- Personnel Management and Labor Relations
- Human Factors Engineering and Man Machine Systems