In a commonly used sense, mental workload refers to the proportion of an individual's total processing capacity taken up by a particular cognitive task or task combination. One approach to the assessment of mental workload is called the secondary task analysis. In this approach, the operator is required to carry out two simultaneous tasks, assigning one (the primary task) a high priority and the other (the secondary task) a lower ...
The time-sharing performance of 12 pilot trainees and 12 subjects with no pilot training was evaluated on 8 dual-task and 4 single-task conditions. Three task characteristics-input modality (auditory or visual), output modality (vocal or manual), and task difficulty (easy or difficult)--were systematically manipulated across conditions in an effort to vary the nature of the specific time-sharing demands imposed. To assess their generality, time-sharing factors were correlated across task conditions. A ...
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