Distracted driving in elderly and middle-aged drivers

Area of Science:

• Cognitive psychology
• Neuroscience
• Transportation safety

Background:

• Automobile driving requires multitasking, with distractions competing for neural resources.
• Cognitive aging may increase susceptibility to distraction due to reduced cognitive resources and attention control.

Purpose of the Study:

• To examine distracted driving performance in elderly and middle-aged drivers under a cognitive load.
• To compare the effects of distraction on steering control, speed, and safety errors between age groups.

Main Methods:

• 86 elderly (mean=72.5 years) and 51 middle-aged (mean=53.7 years) drivers participated.
• Distracted driving was simulated using the Paced Auditory Serial Addition Task (PASAT) in an instrumented vehicle.
• Driving performance metrics included steering control, speed, and safety errors, compared to baseline.

Main Results:

• Distraction reduced steering control in both groups, with greater steering variability in middle-aged drivers.
• Elderly drivers drove slower and exhibited decreased speed variability during distraction.
• Elderly drivers showed a tendency to "freeze up" by holding the gas pedal steady, potentially to manage cognitive load.

Conclusions:

• Distraction negatively impacts driving performance across age groups, affecting steering control.
• Age-related differences in driving behavior under distraction suggest adaptive strategies in older adults.
• While many drivers commit more errors when distracted, some improve performance, indicating attentional resource allocation to safety-critical tasks.