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DiffIE : Changing How You View Changes on the Web

DiffIE : Changing How You View Changes on the Web. Jaime Teevan, Susan T. Dumais, Daniel J. Liebling, and Richard L. Hughes Microsoft Research. Information Artifacts Change. Digital Dynamics Easy to Capture. Web Dynamics. Content Changes.

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DiffIE : Changing How You View Changes on the Web

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  1. DiffIE: Changing How You View Changes on the Web Jaime Teevan, Susan T. Dumais, Daniel J. Liebling, and Richard L. Hughes Microsoft Research

  2. Information Artifacts Change

  3. Digital Dynamics Easy to Capture

  4. Web Dynamics Content Changes January February March April May June July August September • Number of studies of change [2, 7, 10, 20] • Frequency and degree of change characterized • Visited pages are more likely to change [2]

  5. January February March April May June July August September People Revisit Web Dynamics • People revisit on the Web a lot • Over half of page visits are revisits [2, 22] • Over a third of searches are for re-finding [23] Content Changes • Revisitation relates to change • 66% of revisits are to changed pages [2] • 20% of the content changes [2] • Revisiting often motivated by change [2, 15] • Change interferes with revisiting [21, 23] January February March April May June July August September

  6. January February March April May June July August September People Revisit Today’s Browse and Search Experiences Ignores … Web Dynamics Content Changes January February March April May June July August September

  7. DiffIE DiffIE toolbar Changes to page since your last visit

  8. Systems That Expose Web Change • Historical access to pages • Internet Archives (archive.org) • Subscription to change • RSS, Web slices • Monitoring support [15] • In-situ awareness of change • symbols • Dynamo [3], Difference Engine [9], WebCQ [17]

  9. Interesting Features of DiffIE New to you Always on Non-intrusive In-situ

  10. Overview • How DiffIE works • How we studied DiffIE • How DiffIE is used • Conclusions and future work

  11. How DiffIE Works

  12. DiffIE Architecture Web Toolbar Component Comparison Component IE Cache DiffIE Client Machine

  13. Toolbar Feedback buttons Status message See previous version Hide highlighting Compare to older versions

  14. Cache • Web page representation • Leaf nodes in DOM: Hash of text • Parent nodes: Hash of children, appended • Cache multiple versions of pages visited • Small footprint (50KB) • Exact duplicates stored as pointer files • Cap count (only 6% of pages visited >5 times) • Privacy preserving

  15. Comparison Component • Change • Deletion • Addition • Movement Node has same children, child changes Node has fewer children Node has more children, child new Node has new child, child present A A B C B C D E D D E F E

  16. Comparison Component • Change • Deletion • Addition • Movement • Highlighted: Additions, changes • Not highlighted: Moves, deletions Node has same children, child changes Node has fewer children Node has more children, child new Node has new child, child present

  17. Studying DiffIE

  18. Interesting Features of DiffIE New to you Always on Background In-situ

  19. Methods for Studying DiffIE • Large scale demonstration • Feedback buttons • Experience interview • 11 people (5 female, 6 male) • Interviewed after extended DiffIE use (2+ weeks) • Asked about general experience • Revisited 10 pages (half from today/yesterday)

  20. HOW DiffIE is Used

  21. Expected New Content

  22. Monitor

  23. Unexpected Important Content

  24. Serendipitous Encounters

  25. Understand Page Dynamics

  26. Attend to Activity

  27. Edit

  28. Unexpected Expected Unexpected Important Content Edit Expected New Content Attend to Activity Understand Page Dynamics Monitor Serendipitous Encounter

  29. Monitor

  30. Find Expected New Content

  31. Conclusion and Future Work

  32. Summary • Web dynamics important • Change and revisitation common and related • DiffIE exposes change upon revisitation • Caches representations of visited pages • Additions and changes identified and highlighted • DiffIE used in unexpected ways • Some Web content becomes more valuable • Not as useful for sites designed around change

  33. Next Steps • Additional ways to display change • Other interfaces: fade, moves/deletes, differences • Just show change: mobile, mash ups • Allow user to subscribe to change • Decide when and what to highlight • Important v. unimportant changes (e.g., ads) • Provide access to unseen change • API exposing change

  34. Jaime Teevan http://research.microsoft.com/~teevan • DiffIE Teevan, J., S. T. Dumais, D. J. Liebling, and R. Hughes. Changing How People View Changes on the Web. UIST 2009. Change Adar, E., J. Teevan, S. T. Dumais, and J. L. Elsas. The Web changes everything: Understanding the dynamics of Web Content. WSDM 2009 (Best Student Paper). RevisitationAdar, E., J. Teevan, and S. T. Dumais. Large scale analysis of Web revisitation patterns. CHI 2008 (Best Paper). RelationshipAdar, E., J. Teevan, and S. T. Dumais. Resonance on the Web: Web dynamics and revisitation patterns. CHI 2009. Thank you.

  35. Extra Slides

  36. DiffIE Received Positively • Feedback buttons • 51% of unsolicited feedback positive (v. 10-25%) • Experience interview (conditioned on change) • 61% positive • 18% neutral • 21% negative

  37. Reported Experience with DiffIE

  38. Performance • Highlighting shown on page load event • Appears 10s to 100s of milliseconds after load • Does not interfere with browsing experience • Often appears after interaction begins • Notification of delay important

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