In-Vehicle Interaction Systems, Eye Movements, and Safety

Area of Science:

• Human-Computer Interaction
• Cognitive Psychology
• Automotive Safety

Background:

• Modern vehicles feature increasingly complex in-vehicle interactive systems.
• These systems, while functional, pose significant risks as driver distractors.
• Understanding the impact of specific distraction types is crucial for automotive safety.

Purpose of the Study:

• To investigate the effects of in-vehicle spatial distractions on driving errors.
• To analyze driver gaze behavior under different spatial distraction conditions.
• To compare the impact of simultaneous versus sequential spatial distractions on driving performance.

Main Methods:

• Development of the "Direction Following in Distracted Driving - Spatial: Simultaneous and Sequential (D3-SSS)" experimental paradigm.
• Twenty-seven participants drove an instrumented vehicle on a test track, responding to directional cues.
• Drivers were exposed to either simultaneous or sequential in-vehicle spatial distractions presented via a dashboard monitor.

Main Results:

• Spatial-simultaneous distractions led to shorter eye fixation durations and fewer fixations on areas of interest compared to spatial-sequential distractions.
• Drivers committed more driving errors during spatial-simultaneous distraction conditions.
• A higher proportion of driving errors were classified as slips rather than lapses under distraction.

Conclusions:

• Spatial-simultaneous in-vehicle distractions are more detrimental to driving performance than spatial-sequential distractions.
• Driver attention and gaze behavior are significantly altered by simultaneous spatial distractions.
• Findings underscore the need for careful design of in-vehicle systems to minimize cognitive load and enhance driver safety.