mouse ether helping users acquire targets across multimon

1
mouse etherhelping users acquire targets across
multimon

• patrick baudischmicrosoft research,
  visualization and interaction research
• ed cutrellken hinckleyrobert gruen

start
target
2
tasks with incorrectvisual feedback
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mouse across multimonproblem 1 different dpi
target
start
low dpi
high dpi
4
mouse across multimonproblem 2 the gap
start
target
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contents

• problem why the cursor gets warped
• eliminating warping with mouse ether
• calibration
• user study up to 28 faster in acquisition task
• conclusions need to test fitts law

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why the cursor gets warped
start
target
low dpi
high dpi
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mouse ether
start
target
low dpi
high dpi
start
target
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calibration
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the math
(ex,ey,)
(dx,dy)
on init
every frame
(cx,cy)
(cx,cy)


screen i
screen j
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off-screen travel
with mouse ether
start
target
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more off-screen travel
users perspective
systemsperspective
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taming off-screen travel

• iteration 1restrict to convex hull
• iteration 2allow entering ether only for the
  purpose of transit
• towards another screen
• at sufficient speed
• otherwise screen boundaries hard

target
start
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user study

• 2x 18 screens
• 1280x1024 and800x600 resolution
• eight participants
• WinFitts software
• 72 movements(4 trials x 9 paths x 2
  directions)

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results
with mouse ether up to 28 faster
Control
1800
1600
MouseEther
1400
1200
1000
Movement Time (ms SEM)
800
600
400
200
0
High-Low
Low-High
Direction of Movement
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conclusions

• multimon offers incorrect visual cues
• this hinders successful target acquisition
• mouse ether improves acquisition speed by
  matching pointer behavior to visual cues
• off-screen travel allows for direct target
  acquisition
• future work investigate target acquisition under
  contradictory visual feedback (? Fitts law?)

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thanks!

• read more at
• www.patrickbaudisch.com
• thanks to
• mary czerwinski, george robertson, desney tan

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