Use of an Indoor Navigation System by Sighted and Blind Travelers: Performance Similarities across Visual Status and Age
Nicholas A. Giudice, Benjamin A. Guenther, Toni M. Kaplan, Shane M. Anderson, Robert J. Knuesel, Joseph F. Cioffi · 2020 · ACM Transactions on Accessible Computing · doi:10.1145/3407191
Summary
This study evaluates an indoor navigation system using commercial iOS devices and Bluetooth beacons to guide blind and visually impaired (BVI) travelers through complex university buildings. The research compared two navigation conditions: a system-aided mode where participants received real-time narrative route descriptions triggered by their location, and a memory-based condition where the same information was provided only at the route's starting point. The system employed a collaborative "user as a sensor" model, where participants manually advanced through route steps by flicking on the touchscreen, matching system descriptions with their own environmental perception. Narrative descriptions were designed with orientation and mobility professionals, following a consistent structure: action to take, distance/metric information, then landmark/destination information. The study tested 14 legally blind participants split into older (60+) and younger (<60) age groups, plus 7 sighted controls, navigating four routes of varying complexity through interconnected buildings at Columbia University's Teachers College.
Key findings
Real-time system-aided navigation significantly improved route completion accuracy: 79% of participants successfully completed routes with system assistance compared to only 36% in the memory-based condition. Bystander assistance requests dropped dramatically from a median of 1.5 requests per route (unaided) to 0.0 (aided). Critically, BVI participants over 60 years old performed nearly identically to their younger peers across all measures—an important finding given that most vision loss is age-related yet navigation technology is rarely studied with older adults. When using the real-time system, no significant performance differences emerged between blind and sighted participants in route completion accuracy or assistance requests, suggesting that access to well-designed narrative information can eliminate functional navigation differences based on visual status. Survey results showed strong user support: median ratings of 7/7 for real-time navigation being easier than memory-based, and 7/7 for increased likelihood of independent travel if such systems were available. Users indicated preferences for hands-free device placement (64%), multimodal output including haptics (79%), and bone-conducting headphones to maintain environmental awareness.
Relevance
This research provides crucial evidence that older BVI adults—the fastest-growing population affected by vision loss—can effectively use indoor navigation technology with performance matching younger users. For practitioners developing accessible navigation systems, the study offers concrete design guidance: real-time context-sensitive information significantly outperforms front-loaded instructions by reducing working memory demands. The collaborative interaction model, where users actively match system descriptions with environmental perception rather than passively following automated directions, promotes engagement and spatial learning while maintaining situational awareness. The finding that well-designed verbal navigation information eliminates performance gaps between blind and sighted users supports the information-access interpretation of spatial challenges in blind navigation—that difficulties arise from insufficient environmental information rather than inherent spatial deficits. Design recommendations include landmark-based descriptions over distance metrics, hands-free operation, multimodal output, and consideration of different strategies for cane versus guide dog users.
Tags: indoor navigation · blind and low vision · wayfinding · Bluetooth beacons · older adults · aging · spatial cognition · assistive technology · orientation and mobility