Age-related differences in the cognitive, visual, and temporal demands of in-vehicle information systems
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Summary
This study investigates age-related differences in the cognitive, visual, and temporal demands associated with interacting with In-Vehicle Information Systems (IVIS). Motivated by the increasing prevalence of complex vehicle technologies and the known decline in cognitive and physical performance among older adults, the research aims to determine if IVIS interactions impose greater distraction costs on older drivers compared to younger drivers. Specifically, it examines whether certain interface modes or task types are more difficult for older users, addressing the potential safety risks posed by these systems. The researchers conducted an on-road driving study with 125 participants divided into two age cohorts: younger drivers (21–36 years) and older drivers (55–75 years). Participants drove six different vehicles equipped with various IVIS interfaces along a low-density residential route. They performed four task types—audio entertainment, calling and dialing, text messaging, and navigation entry—using three modes of interaction: voice commands, center stack touchscreens, and center console controls. Distraction and workload were measured using a Detection Response Task (DRT), which assessed cognitive workload via reaction time to vibrotactile stimuli and visual demand via hit rates for visual stimuli. Subjective workload was also recorded using the NASA Task Load Index (TLX). Data were analyzed using linear mixed-effects models to account for missing data and individual variability. The results demonstrated significant age-related differences in task performance. Older drivers took significantly longer to complete IVIS tasks than younger drivers, with mean completion times of 30.2 seconds for older adults compared to 23.5 seconds for younger adults. Older drivers also exhibited slower reaction times to DRT stimuli, indicating higher cognitive workload, and reported higher subjective task demand. While task completion times varied by task type and interaction mode—with navigation entry and voice commands generally taking longer—the interaction between age and mode of interaction was not significant, suggesting that older drivers struggled across all interface types. Notably, only audio entertainment and calling tasks consistently fell below the 24-second safety threshold for both age groups, whereas navigation and texting often exceeded it, particularly for older drivers. The findings highlight that older drivers face significantly higher cognitive, visual, and temporal costs when using IVIS, increasing their potential for distraction and crash risk. Although advancements in vehicle technology offer benefits, older adults may struggle the most to use them effectively due to generalized slowing and increased multitasking demands. The study underscores the need for careful implementation of IVIS designs that account for age-related declines in performance, particularly for complex tasks like navigation entry. These results provide empirical evidence that current IVIS interactions pose distinct safety challenges for older drivers, informing future human-machine interface design and regulatory guidelines.
Key finding
Older drivers (55-75) consistently took longer to complete IVIS tasks, were slower to react on the DRT, and reported higher subjective workload than younger drivers (21-36) across all task types and modes of interaction; the age-related demand cost was largest for voice commands and center-stack touchscreen interactions, indicating that interface complexity disproportionately taxes older drivers.
Methodology
on_road
Sample size: 125
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 author_sweep_intake on 2026-05-28 (7 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | author_sweep | — | — | 6 | 2026-05-28 |
| archive | success | unpaywall | — | — | 2 | 2026-06-02 |
| 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 | semantic_scholar | — | — | 2 | 2026-06-15 |
| promote | success | — | — | — | 2 | 2026-06-06 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 2 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 17 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Applied Guidance: design guidelines
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