AN EVALUATION OF WORKLOAD MODEL PREDICTIONS IN A HELICOPTER ENVIRONMENT

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Authors
  1. Cain, B.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The report compares the empirical workload results obtained during a field exercise involving four CH-136 Kiowa crews with results predicted from a task network simulation of the exercise. None of the correlation coefficients is outstanding and only a few of the analytical measures explained greater than 50% of the variance in the empirical workload scores. The correlations between the pilots' empirical workload scores and the analytical workload values were generally greater than that found for the observers, possibly a result of the smaller number of subjects in the observer group or perhaps reflecting greater attention focused on the workload of the pilot by the modelling community. The variation of the workload measures within each flight was substantial, suggesting individual differences between subjects as well as differences in the details of each mission played significant roles in determining the perception of workload rated by the subjects. Of the overall workload measures, the simpler measures were found to capture the greatest portion of the empirical workload variance although these measures provide little detail in what is actually causing the overload and at best only capture 50% of the workload variance. While the multi-dimensional workload measures may provide greater detail about what is causing high workloads, they do not seem to be capturing a great deal of the workload variance to begin with. TRUNCATED
Keywords
Task network;Cognitive workload;Mental workload
Report Number
DCIEM-97-R-66 — Technical Report
Date of publication
01 Dec 1997
Number of Pages
64
DSTKIM No
98-00515
CANDIS No
507430
Format(s):
Hardcopy;Document Image stored on Optical Disk

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