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The Travails of Visually Impaired Web Travelers

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

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The Travails of Visually Impaired Web Travelers

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  1. The Travails of Visually Impaired Web Travelers By Carole Goble Simon Harper Robert Stevens Presented by Chih-Tang Lee

  2. 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.”

  3. Traveling • 3 mental representations: • Landmarks, route knowledge, survey knowledge • Author’s definition of travel: • “… confident navigation and orientationwith 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.

  4. 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.

  5. 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.

  6. Model of Travel • Mobility instruments - Consultation, detection and identification with mobility instruments.

  7. Mobility Evaluation • Is the object a cue or obstacle? • Travel purpose: seeking information, orientation, navigation, etc. • User • Timeliness of feedback • User agent • Presentation form

  8. Mobility Evaluation Common presentation forms

  9. IMDB Home Page Evaluation http://www.imdb.com/

  10. IMDB Home Page Evaluation

  11. IMDB Home Page Evaluation

  12. 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.

  13. Authors Carole Goble Robert Stevens 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 ? Simon Harper

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