Curvature Dial, demo presented at CHI 2005

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Curvature Dial Eyes free parameter entry for GUIs
mc schraefel, Graham Smith, Patrick
Baudisch IAM Group, U of Southampton Microsoft
Research
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DEMO

• You can download it now

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Curvature Dial
What it is
Motivation
Related work
Radial scroll
Virtual Scroll Ring
Bonus material
Test Suite Comparisons Live Demo (Audience
Participation) Future Questions Conclusions Questi
ons
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Motivation
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Developed to address problem of scrolling on
touch-based devices, like tablets and wall
displays
Motivation
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Related Work
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Smooth, variable-speed scrolling in one
dimension for stylus/touch input
Radial Scroll
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Evans, Tablet-Based Valuators That Provide One,
Two, or Three Degrees of Freedom. Computer
Graphics
Taking advantage of the Vernier Effect
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But Lo! A problem

• Jump, go ahead and...

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Curvature Dial for real value, eyes-free
parameter entry - in particular for touch-screen
input. - eyes-free extension for techniques like
Guimbretiere and Winograds FlowMenus
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UIST05 the year of the dial

• Radial Scroll (pre Curvature Drag)
• Virtual Scroll Ring

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Comparison with Virtual Scroll Ring
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When Where and How
The Pilot Studies
Contributions by Pat, mc and Sacha Brostoff,
Ray Cooke (Southampton) Tomer Mocovich (Brown)
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Questions

• How do the techniques compare for stylus based
  computing?
• How do they work on distinct platforms?
• How do different distances effect?

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Things NOT looking at

• How to invoke
• How to go in multiple directions
• Want to focus on where and what contexts are most
  appropriate
• Soseries of pilot studies

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Studies Zoom and Scroll
SCROLLING Compare Dialing techniques against
scroll bars for scrolling FACTORS distance,
platform
ZOOMING Compare Dialing techniques against stroke
(hand tool-like eyes free stroke) FACTORS
distance, platform
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Platforms
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Test Suite Compare Dial types for
scrolling/zooming and variable distances
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Study 1 scrolling, smartboard
Movement Time for scrolling task on Smartboard
Error rates for the Smartboard task
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Lessons Learned Study 1

• Scroll bars win on the large screen, but VSR
  significantly better than other dials
• VSR more learnable big distances, big circles
  seem more learnable than the Vernier approach of
  small circles
• Problem with Vernier approach may be
  implementation issues

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Study 2 Scrolling/PDALong Distance
Time
Lessons Learned PDA is a useful space for
dialing - interesting trade-offs on error
performances
Errors
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Study 3 Zooming, Smartboard
Errors
Time
Lessons Learned Stroking has some interesting
properties to explore competes with VSR Great
performance, but people prefer VSR Observe
short little multiple, rather than long strokes
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Study 4 Zooming, PDA Size
Time
Stroking more efficient errors about the same
Virtual Scroll Ring preferred
Errors
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Next Steps from studies

• Curvature Dial against VSR (both non-accelerated)
  scrolling, four distances Pick a winner and run
  with it
• Winner accelerated vs. non-accelerated, again
  scrolling, four distances pick a winner and run
  with it
• Hand tool against accelerated hand tools pick a
  winner
• winner hand tool against winner dial
• just scrollbar four document lengths and three
  display sizes and four distances where does it
  break
• Winner incremental technique vs. scrollbar vs.
  combined technique, four document lengths and
  four distances, three display sizes

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Conclusions

• Dialing is worth investigating for PDAs
  especially
• VSR is a strong favorite
• Vernier needs to be revisited
• Keep Checking test suite will be updated
  regularly
• Thoughts/ideas welcome

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Questions
(Pat last seen answering questions)