Cardiac Measures of Driver Workload during Simulated Driving with and without Visual Occlusion
DOI: 10.1518/hfes.45.4.525.27089
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Abstract
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/8646675 Cardiac Measures of Driver Workload during Simulated Driving with and without Visual Occlusion Article in Human Factors The Journal of the Human Factors and Ergonomics Society · December 2003 DOI: 10.1518/hfes.45.4.525.27089 · Source: PubMed CITATIONS READS 43 34 4 authors, including: Richard W Backs John Lenneman Central Michigan University Toyota Research Institute of
Summary
Driving simulator study using cardiac measures (heart rate, pre-ejection period, respiratory sinus arrhythmia) alongside performance and visual-demand measures to assess driver workload during a fixed-speed (72.4 km/h) curve-driving task with three curve radii (582, 291, 194 m), with and without visual occlusion of the road scene. Designed to extend Backs et al.'s (1999) flight-simulator autonomic-control model to driving and to dissociate perceptual from central/motor processing demands.
Key finding
Cardiac measures were differentially sensitive to curve radius (with the 291-m curve patterning differently from the 582- and 194-m curves) but unaffected by visual occlusion, which only degraded driving performance — supporting use of psychophysiology + visual occlusion to dissociate perceptual demand from central/motor processing demand.
Methodology
Driving simulator at fixed 72.4 km/h on a course with three curve radii (582, 291, 194 m), each driven with and without visual occlusion. Recorded heart rate, pre-ejection period, respiratory sinus arrhythmia, driving performance, and visual demand. Within-subject comparison of cardiac and performance measures across radii and occlusion conditions.
Sample size: N=15 male university students
Quality score: 5 / 5