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The Travails of Visually Impaired Web Travelers. By Carole Goble Simon Harper Robert Stevens. Presented by Chih-Tang Lee. Problem addressed Most visual navigation cues are not appropriate for a VI user to navigate in the virtual world. Hypothesis - PowerPoint PPT Presentation
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The Travails of Visually Impaired Web Travelers
Presented by Chih-Tang Lee
By Carole GobleSimon Harper
Robert Stevens
Problem addressed Most visual navigation cues are not appropriate for a VI user to
navigate in the virtual world.
Hypothesis Propose a model that evaluates mobility support given to VI
users on the web.
“… traveling and mobility on the web mirrors traveling and mobility in the physical world.”
Traveling 3 mental representations:
Landmarks, route knowledge, survey knowledge
Author’s definition of travel: “… confident navigation and orientation with purpose, ease and
accuracy within an environment.”
In the physical world: Simpler information of the environment. Detailed route description and more specific obstacle information. Increased use of mental maps.
Traveling
In the virtual world: Rely more on audible solutions than enhancing actual web
navigation. Screen scraping (sensory translation): web browsers and specialist
browsers (screen readers). Listening vs. scanning: information flow is slower. Explicitly warned of obstacles. Mental map usage is limited.
Model of Travel Travel objects - Travelers use landmarks and memory objects to
make sure they are going in the right direction.
Mobility actions - And navigates and orientates by consulting memory objects, and detecting and identifying landmarks.
Model of Travel Mobility instruments - Consultation, detection and identification with mobility instruments.
Mobility Evaluation
Is the object a cue or obstacle?Travel purpose: seeking information,
orientation, navigation, etc.UserTimeliness of feedback User agentPresentation form
Mobility Evaluation Common presentation forms
IMDB Home Page Evaluation
IMDB Home Page Evaluation
Conclusion
Related travel in the virtual world to that in the real world.
The proposed model can aid the identification of cues and obstacles and promote improved mobility support for VI users.
Need to extend model’s usage to web sites.
?
Authors
Carole Goble
Robert Stevens
Simon Harper
Professor, University of Manchester
Prototype mobility tools for visually impaired surfers
A pilot study to examine the mobility problems of visually impaired users traveling the web
