Overview
The Red Scientific Detection Response Task (DRT) system implements ISO 17488:2016 for assessing cognitive load in driving. Millisecond-precision timing with configurable stimulus intervals, wireless response button, and TTL trigger I/O for synchronization. Battery powered for in-vehicle use, compatible with RS Logger software.
Used for voice interface evaluation, hands-free system testing, ADAS and automation studies, and academic cognitive load research.
How It Works
The DRT presents stimuli at random intervals (3-5 seconds apart). Participants respond by pressing a button as quickly and accurately as possible while performing a secondary task:
- Response Time (RT) — Time from stimulus onset to button press; longer RTs indicate higher cognitive load
- Hit Rate — Percentage of stimuli correctly detected (responses within 100-2500ms)
- Miss Rate — Stimuli that went undetected, indicating attentional lapses
When cognitive load increases, response times slow and hit rates decrease—providing a sensitive, real-time measure of mental workload.
Stimulus Modalities
ISO 17488 defines three DRT configurations. We offer systems for each:
Tactile DRT (TDRT)
A small vibrating motor placed on the participant's shoulder or collar. The tactile stimulus avoids interference with visual tasks, making it ideal for evaluating displays and touchscreens.
Head-Mounted DRT (HDRT)
A red LED mounted to a lightweight headband, positioned in the participant's peripheral vision. The visual stimulus moves with the head, maintaining a consistent visual angle.
Remote DRT (RDRT)
A fixed LED positioned in the peripheral visual field, typically mounted on the dashboard or A-pillar. Also known as the Peripheral Detection Task (PDT).
Standards Compliance
ISO 17488:2016
International standard defining DRT methodology for assessing attentional effects of cognitive load in driving. Specifies apparatus, procedures, timing parameters, and metrics.
Research Validated
The DRT has been extensively validated in peer-reviewed research as a sensitive measure of cognitive workload that correlates with driving performance decrements.
Get Started
Ready to measure cognitive load in your research? Contact us to discuss which DRT configuration is right for your application.