HT2010 Paper Presentation by Jacek Gwizdka


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Of Kings, Traffic Signs and Flowers: Exploring Navigation of Tagged Documents

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HT2010 Paper Presentation by Jacek Gwizdka

  1. 1. Of Kings, Traffic Signs and Flowers: Exploring Navigation of Tagged Documents Jacek Gwizdka, Department of Library and Information Science CONTACT:
  2. 2. Process of Tagging http : //
  3. 3. Process of Tagging and Tag-space <ul><li>Users associate tags with web resources </li></ul><ul><li>Tags serve in social, structural, and semantic role </li></ul><ul><ul><li>structural role: starting points for navigation; helping users to orient themselves </li></ul></ul><ul><ul><li>semantic role: description of a set of associated resources </li></ul></ul><ul><li>Tag space: set of web resources with associated tags (descriptors) </li></ul>many-to-many relationships
  4. 4. An Example of Navigation (CiteULike) information  retrieval  algorithms  phylogeny
  5. 5. An Example of Navigation (CiteULike) <ul><li>Pivot browsing: a lightweight navigation mechanism; users reorient view </li></ul><ul><li>Each navigation step is treated as separate </li></ul><ul><ul><li>At each step context is switched </li></ul></ul><ul><ul><li>Relationships between steps are not shown </li></ul></ul><ul><ul><ul><li>e.g., overlap between tag clouds not indicated </li></ul></ul></ul>1. information  2. retrieval  3. algorithms  4. phylogeny
  6. 6. Research Questions <ul><li>How can we support continuity in “tag-space” navigation? </li></ul><ul><li>How do people understand navigation in tag-space? </li></ul>
  7. 7. User Interface with “History tag clouds” (Tag Trails) Supporting continuity in tag-space navigation by providing history information  retrieval  algorithms  phylogeny History tag clouds
  8. 8. User Interface with Heat map (Tag Trails) <ul><li>Supporting continuity in tag-space navigation by providing history and making (some) relationships (more) explicit </li></ul>Tag cloud Results list Column-tags: most recently visited tags from left to right Row-tags: selection of most frequent tags Cells color-coded according to tag’s df Heat map
  9. 9. Navigation History and Relationships in Heat map
  10. 10. User Study <ul><li>Exploratory study </li></ul><ul><li>10 study sessions each with a pair* of participants </li></ul><ul><ul><ul><li>18 participants working in pairs </li></ul></ul></ul><ul><li>3 tasks, each using a different variation of the interface </li></ul><ul><li>data set from CiteULike (also </li></ul><ul><li>paired talk aloud protocol </li></ul><ul><li>interaction log and screen cam recorded </li></ul><ul><li>debriefing </li></ul><ul><ul><li>interview </li></ul></ul><ul><ul><li>draw what they experienced </li></ul></ul><ul><ul><ul><li>using physical world analogies </li></ul></ul></ul>
  11. 11. User Interfaces
  12. 12. Results <ul><li>focus on qualitative results </li></ul>
  13. 13. The Kingdom <ul><li>Hierarchical relationship between tags </li></ul>
  14. 14. The Space <ul><li>Notion of distance </li></ul><ul><li>Navigation – movement in one direction: to weaker associations </li></ul><ul><li>Relative to the initial tag </li></ul>
  15. 15. The Labyrinth <ul><li>Location, movement, distance </li></ul>
  16. 16. <ul><li>Location, movement, distance </li></ul>The Journey
  17. 17. The “Flower-picking” Journey
  18. 18. The Conversation <ul><li>Topic drift </li></ul>
  19. 19. User Expectations <ul><li>Successive navigation steps related to the initial tag </li></ul><ul><ul><li>if the initial tag missing, a few users restarted the process </li></ul></ul><ul><li>“ Search” results narrowed down </li></ul>
  20. 20. Summary & Conclusions <ul><li>Users experience “switching”, yet expect some continuity </li></ul><ul><li>Pivot browsing seems to be conceptually not lightweight </li></ul><ul><ul><li>conceptualizing multiple tags assigned in different quantities to different documents is difficult </li></ul></ul><ul><li>Users may be (to some extent) misunderstanding navigation in tag-spaces </li></ul><ul><li>Future work: support navigation continuity </li></ul><ul><ul><li>simplify user interface, two alternatives: </li></ul></ul><ul><ul><ul><li>a tag cloud based on some formula that incorporates previously “visited” tags </li></ul></ul></ul><ul><ul><ul><li>a further developed heat map </li></ul></ul></ul><ul><li>Study limitations include: </li></ul><ul><ul><li>a small sample; a short time ; a perhaps atypical task for a tag-based navigation </li></ul></ul>
  21. 21. Thank you! Questions? <ul><li>Jacek Gwizdka , School of Communication & Information, Rutgers U. </li></ul><ul><li>CONTACT </li></ul><ul><li>& </li></ul><ul><li>MORE INFO </li></ul>
  22. 22. Bonus slides
  23. 23. User Interface with the Heat map - Tooltip
  24. 24. Interface with a heat map and history tag clouds