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HT2010 Paper Presentation by Jacek Gwizdka

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This document summarizes research into how users navigate tagged document collections and explores interface designs to support continuity during navigation. A study was conducted with pairs of users performing tasks in interfaces with history tag clouds or a heat map visualization of tag relationships. Users expected some continuity between navigation steps but found pivot browsing disruptive. The heat map helped show relationships but was still difficult to understand. Future work should further simplify interfaces and better support continuous navigation through tagged document collections.

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Of Kings, Traffic Signs and Flowers: Exploring Navigation of Tagged Documents Jacek Gwizdka, Department of Library and Information Science CONTACT: www.jsg.tel
Process of Tagging http : //bit.ly/tagtrails
Process of Tagging and Tag-space Users associate tags with web resources Tags serve in social, structural, and semantic role structural role: starting points for navigation; helping users to orient themselves semantic role: description of a set of associated resources Tag space: set of web resources with associated tags (descriptors) many-to-many relationships
An Example of Navigation (CiteULike) information retrieval algorithms phylogeny
An Example of Navigation (CiteULike) Pivot browsing: a lightweight navigation mechanism; users reorient view Each navigation step is treated as separate At each step context is switched Relationships between steps are not shown e.g., overlap between tag clouds not indicated 1. information 2. retrieval 3. algorithms 4. phylogeny
Research Questions How can we support continuity in tag-space navigation? How do people understand navigation in tag-space?
User Interface with History tag clouds (Tag Trails) Supporting continuity in tag-space navigation by providing history information retrieval algorithms phylogeny History tag clouds
User Interface with Heat map (Tag Trails) Supporting continuity in tag-space navigation by providing history and making (some) relationships (more) explicit 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 tags df Heat map
Navigation History and Relationships in Heat map
User Study Exploratory study 10 study sessions each with a pair* of participants 18 participants working in pairs 3 tasks, each using a different variation of the interface data set from CiteULike (also deli.cio.us) paired talk aloud protocol interaction log and screen cam recorded debriefing interview draw what they experienced using physical world analogies
User Interfaces
Results focus on qualitative results
The Kingdom Hierarchical relationship between tags
The Space Notion of distance Navigation movement in one direction: to weaker associations Relative to the initial tag
The Labyrinth Location, movement, distance
Location, movement, distance The Journey
The Flower-picking Journey
The Conversation Topic drift
User Expectations Successive navigation steps related to the initial tag if the initial tag missing, a few users restarted the process Search results narrowed down
Summary & Conclusions Users experience switching, yet expect some continuity Pivot browsing seems to be conceptually not lightweight conceptualizing multiple tags assigned in different quantities to different documents is difficult Users may be (to some extent) misunderstanding navigation in tag-spaces Future work: support navigation continuity simplify user interface, two alternatives: a tag cloud based on some formula that incorporates previously visited tags a further developed heat map Study limitations include: a small sample; a short time ; a perhaps atypical task for a tag-based navigation
Thank you! Questions? Jacek Gwizdka , School of Communication & Information, Rutgers U. CONTACT ht2010@gwizdka.com & http://jsg.tel MORE INFO http://bit.ly/tagtrails
Bonus slides
User Interface with the Heat map - Tooltip
Interface with a heat map and history tag clouds

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HT2010 Paper Presentation by Jacek Gwizdka

  • 1. Of Kings, Traffic Signs and Flowers: Exploring Navigation of Tagged Documents Jacek Gwizdka, Department of Library and Information Science CONTACT: www.jsg.tel
  • 2. Process of Tagging http : //bit.ly/tagtrails
  • 3. Process of Tagging and Tag-space Users associate tags with web resources Tags serve in social, structural, and semantic role structural role: starting points for navigation; helping users to orient themselves semantic role: description of a set of associated resources Tag space: set of web resources with associated tags (descriptors) many-to-many relationships
  • 4. An Example of Navigation (CiteULike) information retrieval algorithms phylogeny
  • 5. An Example of Navigation (CiteULike) Pivot browsing: a lightweight navigation mechanism; users reorient view Each navigation step is treated as separate At each step context is switched Relationships between steps are not shown e.g., overlap between tag clouds not indicated 1. information 2. retrieval 3. algorithms 4. phylogeny
  • 6. Research Questions How can we support continuity in tag-space navigation? How do people understand navigation in tag-space?
  • 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. User Interface with Heat map (Tag Trails) Supporting continuity in tag-space navigation by providing history and making (some) relationships (more) explicit 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 tags df Heat map
  • 9. Navigation History and Relationships in Heat map
  • 10. User Study Exploratory study 10 study sessions each with a pair* of participants 18 participants working in pairs 3 tasks, each using a different variation of the interface data set from CiteULike (also deli.cio.us) paired talk aloud protocol interaction log and screen cam recorded debriefing interview draw what they experienced using physical world analogies
  • 12. Results focus on qualitative results
  • 13. The Kingdom Hierarchical relationship between tags
  • 14. The Space Notion of distance Navigation movement in one direction: to weaker associations Relative to the initial tag
  • 15. The Labyrinth Location, movement, distance
  • 16. Location, movement, distance The Journey
  • 19. User Expectations Successive navigation steps related to the initial tag if the initial tag missing, a few users restarted the process Search results narrowed down
  • 20. Summary & Conclusions Users experience switching, yet expect some continuity Pivot browsing seems to be conceptually not lightweight conceptualizing multiple tags assigned in different quantities to different documents is difficult Users may be (to some extent) misunderstanding navigation in tag-spaces Future work: support navigation continuity simplify user interface, two alternatives: a tag cloud based on some formula that incorporates previously visited tags a further developed heat map Study limitations include: a small sample; a short time ; a perhaps atypical task for a tag-based navigation
  • 21. Thank you! Questions? Jacek Gwizdka , School of Communication & Information, Rutgers U. CONTACT ht2010@gwizdka.com & http://jsg.tel MORE INFO http://bit.ly/tagtrails
  • 23. User Interface with the Heat map - Tooltip
  • 24. Interface with a heat map and history tag clouds