Abstract
The importance of the World Wide Web for information dissemination is indisputable. However, the dominance of visual design on the Web leaves visually disabled people at a disadvantage. Although assistive technologies, such as screen readers, usually provide basic access to information, the richness of the Web experience is still often lost. In particular, traversing the Web becomes a complicated task since the richness of visual objects presented to their sighted counterparts are neither appropriate nor accessible to visually disabled users. To address this problem, we have proposed an approach called Dante in which Web pages are annotated with semantic information to make their traversal properties explicit. Dante supports usage of different annotation techniques and as a proof-of-concept in this article, pages are annotated manually which when transcoded become rich. We first introduce Dante and then present a user evaluation which compares how visually disabled users perform certain travel-related tasks on original and transcoded versions of Web pages. We discuss the evaluation methodology in detail and present our findings, which provide useful insights into the transcoding process. Our evaluation shows that, in tests with users, document objects transcoded with Dante have a tendency to be much easier for visually disabled users to interact with when traversing Web pages.
- Amitay, E., Carmel, D., Darlow, A., Lempel, R., and Soffer, A. 2003. The connectivity sonar: Detecting site functionality by structural patterns. In Proceedings of the 14th ACM Conference on Hypertext and Hypermedia. ACM Press, 38--47. Google ScholarDigital Library
- Asakawa, C. and Takagi, H. 2000. Annotation-based transcoding for nonvisual web access. In Proceedings of ASSETS'00. ACM Press, 172--179. Google ScholarDigital Library
- Atzeni, P., Mecca, G., and Merialdo, P. 1997. To weave the web. In Proceedings of the 23rd International Conference on Very Large Data Bases. 206--215. Google ScholarDigital Library
- Berners-Lee, T. 2000. Weaving the Web. Texere.Google Scholar
- Bickmore, T. and Schilit, B. 1997. Digestor: Device-independent access to the World Wide Web. In Proceedings of the 6th International World Wide Web Conference. 655--663. Google ScholarDigital Library
- Brajnik, G., Cancila, D., Nicoli, D., and Pignatelli, M. 2005. Do text transcoders improve usability for disabled users? In Proceedings of the International Cross-Disciplinary Workshop on Web Accessibility (W4A'05). 9--17. Google ScholarDigital Library
- Brown, S. and Robinson, P. 2001. A World Wide Web mediator for users with low vision. In CHI 2001 Workshop, Universal Design: Towards Universal Access in the Information Society.Google Scholar
- Buyukkokten, O., Kaljuvee, O., Molina, H., Paepcke, A., and Winograd, T. 2002. Efficient Web browsing on handheld devices using page and form summarization. ACM Trans. Inform. Syst. 20, 1, 82--115. Google ScholarDigital Library
- Carr, L., Kampa, S., Hall, W., Bechhofer, S., and Goble, C. 2004. Handbook on Ontologies. (Chapter COHSE: Conceptual Open Hypermedia Service). Springer, 193--209.Google Scholar
- Chen, J., Zhou, B., Shi, J., Zhang, H., and Wu, Q. 2001. Function-based object towards Web site adaptation. In Proceedings of the 10th International World Wide Web Conference. ACM. Google ScholarDigital Library
- Chen, Y., Ma, W., and Zhang, H. 2003. Detecting Web page structure for adaptive viewing on small form factor devices. In Proceedings of the 12th International World Wide Web Conference. Google ScholarDigital Library
- Chisholm, W., Vanderheiden, G., and Jacobs, I. 1999. Web content accessibility guidelines 1.0. World Wide Web Consortium (W3C). http://www.w3.org/TR/1999/WAI-WEBCONTENT/. Google ScholarDigital Library
- Cove, J. and Walsh, B. 1998. Online text retrieval via browsing. Inform. Proc. Manag. 24, 1, 31--37. Google ScholarDigital Library
- Coyne, K. P. and Nielsen, J. 2001. Beyond ALT text: Making the Web easy to use for users with disabilities. Nielson Norman Group.Google Scholar
- Craven, J. and Brophy, P. 2003. Nonvisual access to the digital library: The use of digital library interfaces by blind and visually impaired people. Library and Information Commission Research Report 145.Google Scholar
- Dix, A., Finlay, J., Abowd, G., and Beale, R. 2004. Human-Computer Interaction 3rd Ed. Prentice Hall. Google ScholarDigital Library
- Edwards, A. and Stevens, R. 1997. Visual dominance and the World Wide Web. In Proceedings of the 6th International World Wide Web Conference.Google Scholar
- Goble, C., Harper, S., and Stevens, R. 2000. The travails of visually impaired web travellers. In the 11th International ACM Conference on Hypertext and Hypermedia. 1--10. Google ScholarDigital Library
- Gunderson, J. and Jacobs, I. 1999. User agent accessibility guidelines 1.0. World Wide Web Consortium (W3C). http://www.w3.org/TR/WAI-USERAGENT/.Google Scholar
- Harper, S. and Bechhofer, S. 2005. Semantic triage for increased accessibility. IBM Syst. J. 44, 3. Google ScholarDigital Library
- Harper, S., Stevens, R., and Goble, C. 1999. Towel: Real world mobility on the Web. In Computer-Aided Design of User Interfaces II, J. Vanderdonckt and A. Puerta, Eds. Kluwer Academic, 305--314. Google ScholarDigital Library
- Hart, S. and Staveland, L. 1988. Development of NASA-TLX (Task Load Index): Results of empirical and theoretical research. In Human Mental Workload, P. A. Hancock and N. Meshkati, Eds. North-Holland: Elsevier Science, 139--183.Google Scholar
- Hori, M., Kondoh, G., and Ono, K. 2000. Annotation-based Web content transcoding. In Proceedings of the 9th International World Wide Web Conference. 197--211. Google ScholarDigital Library
- Hori, M., Ono, K., Koyanagi, T., and Abe, M. 2002. Annotation for transformation for the automatic generation of content customization metadata. In Pervasive, F. Mattern and M. Naghshineh, Eds. Lecture Notes in Computer Science, vol. 2414, Springer. Google ScholarDigital Library
- Howell, J. 2000. Get the Message Online. Royal National Institute of the Blind (RNIB).Google Scholar
- Ivory, M., Mankoff, J., and Le, A. 2003. Using automated tools to improve Web site usage by users with diverse abilities. Inform. Techn. Soc. (Special Issue on Web Navigation Skills) 3, 1, 195--236.Google Scholar
- Kelly, B. 2002. Webwatch: An accessibility analysis of UK university entry points. Tech. rep., The University of Bath- Ariadne Issue 33. http://www.ariadne.ac.uk/issue33/web-watch/.Google Scholar
- Lowe, D. and Hall, W. 1998. Hypermedia and the Web: An Engineering Approach. John Wiley and Sons Ltd. Google ScholarDigital Library
- Lynch, K. 1960. The Image of the City. The MIT Press.Google Scholar
- McGuinness, D. and Harmelen, F. 2004. OWL Web ontology language reference. World Wide Web Consortium (W3C). http://www.w3.org/TR/2004/REC-owl-features-20040210/.Google Scholar
- Nielsen, J. 1996. Inverted pyramids in cyberspace. Alertbox. http://www.useit.com/alertbox/9606.html.Google Scholar
- Nielsen, J. 1997. How users read on the Web. Alertbox. http://www.useit.com/alertbox/9710a.html.Google Scholar
- Paciello, M. 2000. Web Accessibility for People with Disabilities. CMP books, CMP media LLC. Google ScholarDigital Library
- Parmanto, B., Ferrydiansyah, R., Saptono, A., Song, L., Sugiantara, I. W., and Hackett, S. 2005. Access: Accessibility through simplification and summarization. In Proceedings of the 2005 International Cross-Disciplinary Workshop on Web Accessibility (W4A'05). 18--25. Google ScholarDigital Library
- Passini, R. 1984. Wayfinding in Architecture. Van Nostrand Reinhold, New York, NY.Google Scholar
- Plessers, P., Casteleyn, S., Yesilada, Y., Troyer, O. D., Stevens, R., Harper, S., and Goble, C. 2005. Accessibility: A Web engineering approach. In Proceedings of the 14th International Conference on World Wide Web. 353--362. Google ScholarDigital Library
- Rep. 2002. A report into key government Web sites. Tech. rep., UK. http://www.iablondon.com/.Google Scholar
- Rep. 2004. The Web: Access and inclusion for disabled people. Tech. rep., Disability Rights Commission (DRC), UK.Google Scholar
- Richards, J. and Hanson, V. 2004. Web accessibility: A broader view. In Proceedings of the 13th International World Wide Web Conference. ACM Press. Google ScholarDigital Library
- RNIB, AbilityNet, DCU, RNID, and Socitm. 2005. Eaccessibility of public sector services in the European Union. European Union policy survey, UK Government Cabinet Office.Google Scholar
- Seeman, L. 2004. The semantic Web, Web accessibility, and device independence. In Proceedings of the International Cross-Disciplinary Workshop on Web Accessibility (W4A), S. Harper, Y. Yesilada, and C. Goble, Eds. 67--73. Google ScholarDigital Library
- Stevens, R. and Edwards, A. 1996. An approach to the evaluation of assistive technology. In Proceedings of Assets'96. ACM Press, 64--71. Google ScholarDigital Library
- Takagi, H., Saito, S., Fukuda, K., and Asakawa, C. 2007. Analysis of navigability of Web applications for improving blind usability. Trans. Hum. Comput. Interac. 14, 3. Google ScholarDigital Library
- Thatcher, J., Bohman, P., Burks, M., Henry, S., Regan, B., Swierenga, S., Urban, M., and Waddell, C. 2002. Constructing Accessible Web Sites. Glasshaus. Google ScholarDigital Library
- Whang, Y., Jung, C., Kim, J., and Chung, S. 2001. Webalchemist: A Web transcoding system for mobile web access in handheld devices. In Optoelectronic and Wireless Data Management, Processing, Storage, and Retrieval. 102--109.Google Scholar
- Wright, P. 1981. Tables in text: The subskills needed for reading formatted information. In The Reader and The Text, L. Chapman, Ed. Heineman, 60--69.Google Scholar
- Wright, P. and Monk, A. 1991. A cost effective evaluation method for use by designers. Inter. J. Man-Mach. Stud. 35, 6, 891--9120. Google ScholarDigital Library
- Yesilada, Y., Harper, S., Goble, C., and Stevens, R. 2004a. Dante annotation and transformation of Web pages for visually impaired users. In Proceedings of the 13th International Conference on World Wide Web. Google ScholarDigital Library
- Yesilada, Y., Harper, S., Goble, C., and Stevens, R. 2004b. Screen readers cannot see (ontology based semantic annotation for visually impaired Web travellers). In Proceedings of the 4th International Conference on Web Engineering (ICWE'04). Lecture Notes in Computer Science, vol. 3140, N. Koch, P. Fraternali, and M. Wirsing, Eds. Springer, 445--458.Google Scholar
- Yesilada, Y., Stevens, R., and Goble, C. 2003. A foundation for tool-based mobility support for visually impaired Web users. In Proceedings of the 12th International Conference on World Wide Web. 422--430. Google ScholarDigital Library
- Yin, X. and Lee, W. 2004. Using link analysis to improve layout on mobile devices. In Proceedings of the 13th International World Wide Web Conference. 338--344. Google ScholarDigital Library
Index Terms
- Evaluating DANTE: Semantic transcoding for visually disabled users
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