Detection Response Task Evaluation for Driver Distraction Measurement for Auditory-Vocal Tasks: Experiment 2
archive: archived pipeline: cataloged verified
Get this paper ↗ (full text — opens at the source; we link to it, we don't host it)
Summary
This study evaluates the Detection Response Task (DRT) as a metric for measuring the attentional demands of auditory-vocal in-vehicle tasks, aiming to extend existing NHTSA Driver Distraction Guidelines. The research sought to compare two DRT variants—Remote DRT (visual targets) and Tactile DRT (vibrating targets)—across driving simulator and non-driving venues. Additionally, the study investigated the suitability of visual metrics (occlusion and eye-glance measures) for auditory-vocal tasks, established benchmarks for acceptable attentional load, and explored correlations between DRT performance, brake response time (BRT), and heart rate. The experiment involved 192 participants recruited according to NHTSA guidelines, divided equally between a driving simulator and a stationary non-driving venue. In the simulator, participants performed car-following tasks while executing secondary tasks, including three auditory-vocal tasks (destination entry, phone dialing, radio tuning), one visual-manual task, and two continuous digit-recall tasks (1-back and 2-back) serving as benchmarks for acceptable and unacceptable cognitive load, respectively. Non-driving participants performed identical tasks while wearing occlusion goggles to simulate driving demands. Data collection included DRT response times and accuracy, BRT during expected and unexpected lead-vehicle braking events, eye-tracking metrics, and heart rate monitoring. Results indicated that the driving simulator was a more sensitive test venue than the non-driving setting, as tasks appeared more demanding when performed intermittently while driving. In the simulator, Tactile DRT responses were consistently slower and less accurate than Remote DRT responses, whereas no such difference was observed in the non-driving venue due to ceiling effects in accuracy. The 2-back task demonstrated significantly higher attentional demand than the 1-back task, supporting its use as a benchmark for unacceptable load. Visual metrics revealed that occlusion testing was unsuitable for assessing auditory-vocal tasks, while total eyes-off-road time remained a viable metric. Brake response time analysis showed a small effect of attentional load during unexpected braking events but not during expected ones. Furthermore, mean heart rate proved sensitive to differences in attentional load across tasks. The study concludes that DRT is a valid measure for auditory-vocal distraction, with the driving simulator providing superior sensitivity over non-driving venues. The findings support the use of the 2-back task as a benchmark for excessive attentional demand and suggest that heart rate is a feasible physiological indicator of cognitive load. However, the lack of strong correlation between DRT delays and brake response times suggests that the behavioral mechanisms for instructed DRT responses differ from those for emergency braking. These results inform the development of safety guidelines for in-vehicle systems, highlighting the need for venue-specific testing protocols and appropriate metrics for auditory-vocal interfaces.
Key finding
The driving simulator demonstrated greater sensitivity in detecting attentional demands of auditory-vocal tasks compared to the non-driving venue, and the 2-back digit-recall task imposed excessive attentional load.
Methodology
mixed_methods
Sample size: 192
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (7 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | rosap | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | success | cached | — | — | 2 | 2026-06-10 |
| clean | success | — | — | — | 1 | 2026-06-01 |
| chunk | success | — | — | — | 1 | 2026-06-01 |
| embed | success | — | — | — | 1 | 2026-06-02 |
| enrich | success | — | — | — | 1 | 2026-05-23 |
| promote | success | — | — | — | 1 | 2026-05-23 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 3 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 20 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.
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
- Methodological Resource: measurement protocol, validation psychometrics