Document Detail

The effects of visibility conditions, traffic density, and navigational challenge on speed compensation and driving performance in older adults.
MedLine Citation:
PMID:  20728615     Owner:  NLM     Status:  MEDLINE    
Research on how older drivers react to natural challenges in the driving environment is relevant for both the research on mental workload and that on age-related compensation. Older adults (M age=70.8 years) were tested in a driving simulator to assess the impact of three driving challenges: a visibility challenge (clear day, fog), a traffic density challenge (low density, high density) and a navigational challenge (participants followed the road to arrive at their destination, participants had to use signs and landmarks). The three challenge manipulations induced different compensatory speed adjustments. This complicated interpretation of the other measures of driving performance. As a result, speed adjustment indices were calculated for each condition and participant and composite measures of performance were created to correct for speed compensation. (These speed adjustment indices correlated with vision test scores and subscales of the Useful Field of View.) When the composite measures of driving performance were analyzed, visibility x density x navigational challenge interactions emerged for hazard RT and SD of lane position. Effects were synergistic: the impact of the interaction of challenge variables was greater than the sum of independent effects. The directions of the effects varied depending on the performance measure in question though. For hazard RT, the combined effects of high-density traffic and navigational challenge were more deleterious in good visibility conditions than in fog. For or SD of lane position, the opposite pattern emerged: combined effects of high-density traffic and navigational challenge were more deleterious in fog than in clear weather. This suggests different aspects of driving performance tap different resources.
Lana M Trick; Ryan Toxopeus; David Wilson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-15
Journal Detail:
Title:  Accident; analysis and prevention     Volume:  42     ISSN:  1879-2057     ISO Abbreviation:  Accid Anal Prev     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-08-23     Completed Date:  2010-12-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1254476     Medline TA:  Accid Anal Prev     Country:  England    
Other Details:
Languages:  eng     Pagination:  1661-71     Citation Subset:  IM    
Copyright Information:
2010 Elsevier Ltd. All rights reserved.
Department of Psychology, MacKinnon Building, University of Guelph, Guelph, Ont., Canada, N1G 2W1.
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MeSH Terms
Acceleration / adverse effects*
Accidents, Traffic / prevention & control*,  psychology
Aging / psychology*
Automobile Driving / psychology*
Computer Simulation*
Environment Design / statistics & numerical data*
Population Density*
Reaction Time
Risk Assessment
Safety / standards
Social Environment*
Workload / psychology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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