Scenario criticality determines the effect of working memory load on brake response time

Several experimental studies have found delayed braking reactions due to non-visual working memory loading tasks such as phone conversation. However, these results seem to be at odds with recent naturalistic driving studies which have failed to find any increased crash or near-crash risk due to working memory load. A possible reason behind this discrepancy, in the case of rear-end crashes, is that the effect of working memory load on brake depends on scenario criticality. This possibility was investigated by means of a meta-analysis on a set of existing experimental studies. The results suggested a strong linear relationship between the magnitude of the response delay due to working memory load and the initial time headway at lead vehicle brake onset. A potential mechanism behind this effect is suggested and implications for the generalisation of experimental brake response time data to real world lead vehicle braking scenarios are discussed.


  • English

Media Info

  • Pagination: 25-36
  • Monograph Title: Proceedings of European Conference on Human Centred Design for Intelligent Transport Systems, April 29-30, 2010, Berlin, Germany

Subject/Index Terms

Filing Info

  • Accession Number: 01382633
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 9782953171211
  • Files: ATRI
  • Created Date: Aug 22 2012 1:25PM