People with visual impairments use a wide variety of sensory information to understand the world around them. Many persons who are visually impaired (i.e., those who are blind or have low vision) use some form of echolocation to monitor the space around them. This process of identifying the properties of an object may be referred to as…

Introduction: This study investigated the user requirements of individuals with visual impairments regarding the information to be included in orientation and mobility (O&M) aids in order for optimally useful audio-tactile maps of campuses to be developed. In addition, this study aimed at investigating the importance (usefulness) that…

Introduction: As the number of people with visual impairments (that is, those who are blind or have low vision) is continuously increasing, rehabilitation and engineering researchers have identified the need to design sensory-substitution devices that would offer assistance and guidance to these people for performing navigational tasks. Auditory…

This article describes and analyzes the development of a navigation and orientation system for people with visual impairments as it evolved over three decades. It includes reflections on how users have been involved in the redesign process and illustrates how people with and without disabilities have collaborated to create a more suitable and…

Introduction: Development of a sensing device that can provide a sufficient perceptual substrate for persons with visual impairments to orient themselves and travel confidently has been a persistent rehabilitation technology goal, with the user interface posing a significant challenge. In the study presented here, we enlist the advice and ideas of…

Accessible Global Positioning Systems (GPS) are changing the way many people with visual impairments (that is, those who are blind or have low vision) travel. GPS provides real-time orientation information so that a traveler with a visual impairment can make informed decisions about path of travel and destination. Orientation and mobility (O&M)…

Eighteen persons with visual impairments evaluated four systematically selected navigation systems. Their performance on 11 tasks, provided ratings, satisfaction on seven aspects of the assistive devices, and explanatory comments show generally valuable functionality and usability, as well as individual marked preferences for various features of…

The effectiveness of different types of verbal information provided by electronic travel aids was studied in a real-life setting. Assessments included wayfinding performance and the preferences of 24 visually impaired users. The participants preferred a combination of route information and environmental information, even though this information…

Global Positioning Systems' (GPS) technology is available for individuals with visual impairments to use in wayfinding and address Lowenfeld's "three limitations of blindness." The considerations and methodologies for teaching GPS usage have developed over time as GPS information and devices have been integrated into orientation and mobility…

This study examined which olfactory cues individuals with visual impairments use most often and determined which of these cues these individuals deemed to be the most important for wayfinding in urban environments. It also investigated the ways in which the individuals use these olfactory cues. (Contains 3 tables.)

Like many other states, California is facing a daunting budget deficit, reportedly about $19 billion. Delayed budgets have held up the disbursement of money, affecting school programs in districts as well as at the California School for the Blind (CSB). The current financial constraints have had an impact on CSB's programs. Its department of seven…

This study investigated navigation with route instructions generated by digital-map software and synthetic speech. The participants, either visually impaired or sighted wearing blindfolds, successfully located rooms in an unfamiliar building. Users with visual impairments demonstrated better route-finding performance when the technology provided…

This article presents two target-location experiments. In the first experiment, 19 participants located a 25-foot chalk circle 93% of the time with a Global Positioning System (GPS) compared to 12% of the time without it. In a single-subject follow-up experiment, the participant came within 1 foot of the target on all GPS trials. Target-location…