SITUATION AWARENESS AND WORKLOAD: BIRDS OF A FEATHER?

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Authors
  1. Hendy, K.C.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
In this paper it is argued that an hierarchical information processing model, with a basis in perceptual control theory, provides the necessary framework for interpreting a large, unfocused empirical literature on the topics of workload and situation(al) awareness (SA). The fundamental importance of situation awareness will emerge in considering the role of the mental model in providing the reference signal for a closed loop perceptual control system. It will e asserted that those aspects of the mental model generally covered by the SA rubric result from high level information processing activity that requires spare capacity to service. Increasing time pressure (workload) reduces the capacity available for this activity. An experiment in the application of a workload scale (NASA TLX) and situation awareness ;metric (SART) to a simulated air traffic control environment is cited. It will be shown that the situation awareness scale taps largely into the workload side of the equation rather than the SA side. Implications for the measurement of SA will be drawn.
Keywords
Situational awareness
Report Number
DCIEM-95-P-10 — Paper
Date of publication
30 Jun 1995
Number of Pages
10
DSTKIM No
98-00085
CANDIS No
506682
Format(s):
Hardcopy;Document Image stored on Optical Disk

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