The effect of driver cognitive abilities and distractions on situation awareness and performance under hazard conditions
DOI: 10.1016/j.trf.2016.07.014
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Summary
This study investigates the influence of driver cognitive abilities and in-vehicle distractions on situation awareness (SA) and driving performance under hazardous conditions. Motivated by the prevalence of in-car distractions and the need to understand how cognitive factors mediate safety, the researchers aimed to isolate relationships between specific driving behaviors (strategic, tactical, and operational), levels of SA, and individual cognitive traits. The study specifically examined how a hazard event and a secondary cell phone task affect driver awareness and performance, and whether cognitive abilities like working memory and visual processing skills support these functions. Sixteen participants with valid licenses drove a high-fidelity STISIM Drive simulator for approximately 12 minutes per trial. The experimental design included a within-subjects factor of distraction, with participants completing trials both with and without a secondary arithmetic task performed via a handheld cell phone. Each trial involved a strategic goal (reaching a destination within a time limit), tactical tasks (passing slower vehicles based on road markings), and an operational hazard (a parked vehicle suddenly entering the lane). Cognitive abilities were assessed prior to driving using tests for working memory span (WMS), Useful Field of View (UFOV) for visual processing speed, and the Embedded Figures Test (EFT) for perceptual skills. Situation awareness was measured using the Situation Awareness Global Assessment Technique (SAGAT), which froze the simulation to query drivers on their perception, comprehension, and projection of the environment. Performance metrics included lane deviation, brake reaction time, successful passing maneuvers, and arrival time. The results demonstrated that the secondary cell phone task significantly degraded driver SA across all levels (perception, comprehension, and projection) both before and after the hazard event, reducing awareness by 10–20%. Conversely, exposure to the hazard itself significantly increased Level 2 SA (comprehension) and overall SA in subsequent driving, regardless of distraction status. However, this boost in SA was only statistically significant in the non-distracted condition. The study found that tactical driving tasks placed greater demands on cognitive abilities and SA compared to operational or strategic tasks. Specifically, working memory and visual-cognitive skills were identified as critical for maintaining SA after hazard exposure. Correlations indicated that higher cognitive ability scores were associated with better SA and performance, particularly for tactical maneuvers. The significance of these findings lies in the clarification of how cognitive resources support driving safety under stress. The study provides empirical evidence that tactical driving requires higher levels of SA and cognitive engagement than previously assumed for operational tasks. It highlights that while hazards can sharpen driver awareness, concurrent distractions can negate this benefit, leading to poorer performance. These results support the development of relational models linking cognition, SA, and driving behavior, offering insights for designing in-vehicle technologies that minimize cognitive overload and enhance safety during hazardous conditions.
Provenance
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | author_sweep | — | — | 2 | 2026-05-27 |
| archive | success | canonical_url | — | — | 1 | 2026-06-09 |
| extract | success | pdftotext | — | — | 2 | 2026-06-09 |
| clean | success | clean | — | — | 1 | 2026-06-09 |
| chunk | success | chunk | — | — | 1 | 2026-06-09 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-09 |
| enrich | failed | — | — | — | 5 | 2026-07-02 |
| promote | success | — | — | — | 1 | 2026-06-04 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-09 |
| tag | success | vector_similarity | — | — | 8 | 2026-06-11 |
| verify | success | — | — | — | 1 | 2026-06-09 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-09; verification: verified.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.
- situational awareness
- cognitive capacity variation
- useful field of view
- cognitive
- hazard perception
- visual
Information type
What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).
- Empirical Findings: behavioral performance data
- Theoretical Contribution: theory or model, conceptual framework