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Techniques for Interacting with Off-Screen Content

Techniques for Interacting with Off-Screen Content. Pourang Irani Carl Gutwin University of Manitoba University of Saskatchewan Grant Partridge Mahtab Nezhadasl University of Manitoba University of Manitoba. Introduction. R. M. R. M. R. R. R. M. R. M. R. R. R. M. R. M.

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Techniques for Interacting with Off-Screen Content

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  1. Techniques for Interacting with Off-Screen Content Pourang Irani Carl Gutwin University of Manitoba University of Saskatchewan Grant Partridge Mahtab Nezhadasl University of Manitoba University of Manitoba

  2. Introduction R M R M R R R M R M R

  3. R R M R M R R R M R M R 2D navigation: Time Multiplexing Zooming

  4. R M R M R R R R M R R M M R R R R M R M R M R 2D navigation: Space Multiplexing Overview+Detail DragMag

  5. Proxy-based techniques [Bezerianos and Balakrishnan, 2005] [Baudisch et al., 2003]

  6. R R 2D navigation: Proxy Hop (Halo + Proxies) M R

  7. Tasks • Baudisch & Rosenholtz [2003] • “Position” • “Closest” • “Avoid” • Spatially Absolute • Existence, Count, Location • Spatially Relative • Proximity to reference, Proximity b/w objects, Cluster

  8. Evaluation: Conditions • Navigation Techniques • Zoom - two-level zoom • DragMag • Hop • Tasks • Absolute • Relative

  9. Zooming

  10. DragMag

  11. Hop

  12. Results: Completion Time

  13. Possible explanations – strategy • Number of operations about 1/5 with hop • Zooming requires more “trips” … • not so good for absolute tasks • … but good for spatial information • useful for relative tasks • DragMag reduced the number of “trips” • allows users to perform relative tasks with ease • but added complexity of managing windows

  14. Possible explanations – task-based • Relative tasks • Need orientation and comparisons b/w views • Rely on VSTM • Absolute tasks • Require information about the objects • Do not require spatial/orientation information

  15. WinHop (hop + windows)

  16. WinHop

  17. WinHop

  18. WinHop

  19. WinHop

  20. WinHop

  21. WinHop (video)

  22. MultiscaleZoom

  23. MultiscaleZoom

  24. MultiscaleZoom (video)

  25. Absolute: Location (winhop)

  26. Relative: Cluster (msz)

  27. Results

  28. Limitations of Hybrid Techniques • WinHop • Many operations, significant learning curve • MultiScale Zoom • Clutter from proxies

  29. Main Findings • Each task requires a different navigation strategy • Proxy-based ideal for target-only info tasks • Time/Space multiplexing ideal for target-target info • Hybrids improve performance in both types of tasks • Performance with Multiscale Zoom remained constant

  30. Conclusion • Beneficial to investigate techniques on multiple tasks • Ideal technique gives target and context information • Hybrid techniques are reliably good • Consider multiscale zoom for small displays • Hybrids performance on other tasks

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