INVESTIGATION OF TIME AND INTENSITY EFFECTS IN OPERATOR WORKLOAD AND PERFORMANCE

Authors
  1. Liao, J.
  2. Milgram, P.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Industrial Engineering
Abstract
Describes an experiment aimed at investigating the possibility that a relationship exists between the time- and intensity-based models of the Human Information Processor (HIP). An extensive literature review is included. In the experiment, time and intensity load were independently manipulated for a simulated air traffic control (ATC) task. Intensity load was varied by changing the number of aircraft under the subject's control at any one time, while time load was manipulated by varying the update interval between simulated radar screen updates. Various workload and performance measures were taken. The results provide tentative support for a theory that has time and intensity loads related through a composite variable which reduces to the time pressure imposed by the task, that is, the amount of time necessary to process the required amount of information, to the time available for decision making and response. A first pass at producing a network model for the ATC task, using the Micro SAINT (TRADEMARK) simulation environment, is reported.
Date of publication
01 Jun 1993
Number of Pages
181
DSTKIM No
93-03823
CANDIS No
133939
Format(s):
Hardcopy;Originator's fiche received by DSIS

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