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Updated: Feb 28, 2026
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Driving Under the Influence: How Music Listening Affects Driving Behaviors
Published on: March 27, 2019
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Load theory behind the wheel; perceptual and cognitive load effects
Gillian Murphy1, Ciara M Greene2
1School of Applied Psychology, University College Cork.
Summary
Perceptual Load Theory explains attention, showing high perceptual load impairs awareness and increases hazard response times in drivers. Cognitive load, however, increases distractor processing, impacting driving behavior.
Area of Science:
- Cognitive Psychology
- Human Factors Engineering
- Transportation Safety
Background:
- Perceptual Load Theory offers a framework for understanding attention and distraction.
- Limited applied research exists despite the theory's potential for real-world applications.
Purpose of the Study:
- To investigate the effects of perceptual and cognitive load on driver visual search and behavior.
- To assess the impact of perceptual load on driver awareness and hazard detection.
Main Methods:
- A driving simulator was used to evaluate drivers' visual search, behavior, and awareness under varying perceptual and cognitive loads.
- Stimuli processing, driving performance metrics, and reaction times (RTs) to hazards were analyzed.
Main Results:
- High perceptual load reduced distractor processing but increased inattentional blindness/deafness and hazard RTs.
- High cognitive load led to increased distractor processing and altered driving behavior.
- Significant differences in driving behavior were observed under different load conditions.
Conclusions:
- The study validates Perceptual Load Theory in applied driving contexts, extending its utility beyond traditional laboratory settings.
- Findings highlight the critical role of perceptual and cognitive load in driver attention, with implications for road safety and design.
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