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Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
Grouping hyperlinks for improved voice/mobile accessibility
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Grouping hyperlinks for improved voice/mobile accessibility

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Alex Penev's presentation at W4A

Alex Penev's presentation at W4A

Published in: Technology, Design
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Transcript

  • 1. Grouping hyperlinks for improved voice/mobile accessibility Alex Penev UNSW / NICTA (Australia)
  • 2. Accessibility
    • Heavily presentation-oriented web
      • blind users “read” sequentially
        • layout gets in the way
  • 3. Accessibility
    • Heavily presentation-oriented web
      • blind users “read” sequentially
        • layout gets in the way
      • mobile users have small-screen devices
    • For some users, “less is more”
  • 4. Hyperlinks
    • Often visit a site with intention of following a link
  • 5. Hyperlinks
    • Often visit a site with intention of following a link
    • Idea: cluster links
      • partition a page’s links into topical groups
        • helps find a link (cf. IVR)
        • way to organize a set of links
  • 6. Example: Centrelink.gov.au
    • Government agency, human services
    • Population obtains info, forms, etc.
    • …but do not visit regularly
      • information need
  • 7.  
  • 8. Centrelink
    • 111 links on the page
    • Some problems for blind users:
      • pop-up menus
        • flatten it?
  • 9. Centrelink
    • 111 links on the page
    • Some problems for blind users:
      • pop-up menus
        • flatten it?
    • Some problems for mobiles:
      • hard to fit/navigate a 3-tier pop-up menu
  • 10. Link clustering
    • Group related links together
      • hopefully in topical groups
  • 11. Link clustering
    • Group related links together
      • hopefully in topical groups
    • How?
      • label links with descriptions
      • partition descriptions
      • assign summary label to each cluster
  • 12.  
  • 13. Link clustering
    • Navigation process:
      • invoke clustering step
      • presented with clusters
        • advertise a label
  • 14. Link clustering
    • Navigation process:
      • invoke clustering step
      • presented with clusters
        • advertise a label
      • select best-sounding cluster
      • layout is lost
    • Faster than serial reading
  • 15. Forming descriptions
    • A set of keywords for each link
      • anchor text, nested tags, URL, content
  • 16. Forming descriptions
    • A set of keywords for each link
      • anchor text, nested tags, URL, content
        • further possibilities: anchor text window, folksonomy tags, <meta>, ontology
    • Example
      • australia.gov.au
        • australia, gov, government, website, travel, taxes, business, people, immigration, etc.
  • 17. Forming descriptions
    • Descriptions can be short and have little overlap
    • Solution?
  • 18. Forming descriptions
    • Descriptions can be short and have little overlap
    • Solution?
      • take into account layout by spreading a link’s influence across DOM
        • borrow descriptions from neighbor links
        • decay weight with distance
  • 19. Clustering step
    • Propagation enriches descriptions
      • relates neighboring links
      • less sparse feature vectors
        • good for clustering!
    • Use a partitioning algorithm
      • e.g. k-means
  • 20. Possible uses
    • Blind users
      • navigate to link via clustering
        • skip layout, skip uninteresting topics
        • general surfing?
  • 21. Possible uses
    • Blind users
      • navigate to link via clustering
        • skip layout, skip uninteresting topics
        • general surfing?
    • Mobile users
      • portal pages
  • 22. Sample results - Centrelink
    • 12 clusters
      • agency, site, main sections, welfare allowances, study & training, health, carers, family, children, maternity & job search/retirement, farming, online security
    • Full table in paper
  • 23.  
  • 24.  
  • 25.  
  • 26. Conclusion
    • Simple, well-known ideas applied to a different problem
      • VSM (tf.idf), clustering
    • May help voice/mobile browsing
    • Future work
      • what is a good description?
      • what is a good label?
  • 27.  
  • 28.  
  • 29.  

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