2025-12-16 ワシントン大学（UW）
＜関連情報＞
- https://www.washington.edu/news/2025/12/16/video-drivers-struggle-to-multitask-when-using-dashboard-touch-screens-study-finds/
- https://dl.acm.org/doi/10.1145/3746059.3747683
動くタッチスクリーン：不注意な運転者に対する認知負荷の影響を定量化する Touchscreens in Motion: Quantifying the Impact of Cognitive Load on Distracted Drivers
: Xiyuan Shen, Seokhyun Hwang, Junhan Kong, Alexandre L. S. Filipowicz, Andrew Best, Jean Costa, + 3
UIST ’25: Proceedings of the 38th Annual ACM Symposium on User Interface Software and Technology Published: 27 September 2025
DOI:https://doi.org/10.1145/3746059.3747683
Abstract
This study investigates the interplay between a driver’s cognitive load, touchscreen interactions, and driving performance. Using an N-back task to induce four levels of cognitive load, we measured physiological responses (pupil diameter, electrodermal activity), subjective workload (NASA-TLX), touchscreen performance (Fitts’ law), and driving metrics (lateral deviation, throttle control). Our results reveal significant mutual performance degradation, with touchscreen pointing throughput decreasing by over 58.1% during driving conditions and lateral driving deviation increasing by 41.9% when touchscreen interactions were introduced. Under high cognitive load, participants demonstrated a 20.2% increase in pointing movement time, 16.6% decreased pointing throughput, and 26.3% reduced off-road glance durations. We identified a prevalent “hand-before-eye” phenomenon where ballistic hand movements frequently preceded visual attention shifts. These findings quantify the impact of cognitive load on multitasking performance and demonstrate how drivers adapt their visual attention and motor-visual coordination when cognitive resources are constrained.
