Techniques for interacting with off screen content
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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

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
Introduction

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2d navigation time multiplexing

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2D navigation: Time Multiplexing

Zooming


2d navigation space multiplexing

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2D navigation: Space Multiplexing

Overview+Detail DragMag


Proxy based techniques
Proxy-based techniques

[Bezerianos and Balakrishnan, 2005]

[Baudisch et al., 2003]


2d navigation proxy

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2D navigation: Proxy

Hop (Halo + Proxies)

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Tasks
Tasks

  • Baudisch & Rosenholtz [2003]

    • “Position”

    • “Closest”

    • “Avoid”

  • Spatially Absolute

    • Existence, Count, Location

  • Spatially Relative

    • Proximity to reference, Proximity b/w objects, Cluster


Evaluation conditions
Evaluation: Conditions

  • Navigation Techniques

    • Zoom - two-level zoom

    • DragMag

    • Hop

  • Tasks

    • Absolute

    • Relative






Possible explanations strategy
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


Possible explanations task based
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















Limitations of hybrid techniques
Limitations of Hybrid Techniques

  • WinHop

    • Many operations, significant learning curve

  • MultiScale Zoom

    • Clutter from proxies


Main findings
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


Conclusion
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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