An Evidence Accumulation Model for Conflict Detection Performance in a Simulated Air Traffic Control Task

This study develops a formal model of conflict detection performance in a simulated en route air traffic control task. This model assumes that participants iteratively sample evidence regarding the state of the world and accumulate it over time. A decision is made when the evidence reaches a threshold that changes over time in response to the increasing urgency of the task. Two experiments were conducted to examine the effects of conflict geometry and timing on response proportions and response time. The first experiment examined how accuracy and response time vary as a function of minimum distance, angle of convergence, and the order in which the aircraft pass the crossing. The second experiment was designed to test the possibility that the effect of angle in the first experiment was attributable to changes in relative distance and that relative velocity did not play a role. Results show that the proposed model is able to predict the observed pattern of response times, including a nonmonotonic relationship between distance at point of closest approach and response time, as well as effects of angle of approach and relative velocity. Evidence accumulation models such as the proposed model appear to provide a good account of performance on a conflict detection task.


  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 164-180
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01142337
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 20 2009 12:37PM