Changes in Attention Levels While Driving a Car Estimated Using Modelling Techniques with Features of Oculo-Motors

<p dir="ltr">Changes in attention levels while driving a car were estimated using a modelling technique involving pupillary changes and the frequency of saccades of 11 drivers. The driving route used in the experiment consisted of 19 sections of road divided into 5 groups: university campus, left turn, straight, right turn, and roundabout. The sections of road with posted speed limits were divided into 6 conditional states, and model parameters were estimated by assuming transitions across the states. The estimated model parameters were used to examine changes in the level of attention resources used during each section of driving. The results of a comparison of attention resources by section showed a significant decrease, in the following order: straight and roundabout, within campus, left turn and right turn. In addition, the relationship between NASA-TLX was evaluated after driving and attention resources were examined, and a significant correlation with the factor for “difficulty” was confirm ed. The relationship between the confidence interval of the change in attention resources and the factor for “mental demand” was also confirmed.</p>