earPod : Eyes-free Menu Selection with Touch Input and Reactive Audio Feedback
description
Transcript of earPod : Eyes-free Menu Selection with Touch Input and Reactive Audio Feedback
University of Toronto
earPod:
Eyes-free Menu Selection with Touch Input and Reactive Audio Feedback
Shengdong Zhao
Pierre Dragicevic
Mark Chignell
Ravin Balakrishnan
Patrick Baudisch
Menu Selection
on
Mobile Devices Often Requires
Visual Feedback
Why Eyes-free?
Why Eyes-free?
Eyes-free capable
Eyes-free capable
Marking Menus
Eyes-free capable
Marking Menus (Expert Use)
Eyes-free capable
Marking Menus (Expert Use)
True eyes-free
• TouchPlayer (Pirhonen et al, 2002)
True eyes-free
• TouchPlayer (Pirhonen et al, 2002)
• Head gesture-based auditory pie menu (Brewster et al, 2003)
earPod
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earPod
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earPod Design
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earPod Walkthrough
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Browsing
Fast browsing
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Fast browsing
Very fast browsing and cancel
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Very fast browsing and cancel
Expert use
Expert use
Interactive Voice Response System
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Interactive Voice Response System
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Slow
Painful
“Touchtone Hell”
(Yin and Zhai, 2006)
Characteristics of IVR
• Inpatient user – Urgent; want to talk to real person
• Lack of user control– It’s both bad and good
• Typically narrow but deep phone tree, resulting long sentences
Visual vs. auditory menu
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Visual Linear Menu
Visual vs. auditory menu
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Visual Linear Menu IVR System
Problems of IVR system
• Speech is serial and slow (Slowiaczek and Nusbaum 1985)
Problems of IVR system
• Synchronous vs. asynchronous communication
Synchronous
Visual Outputs
Mouse Input
time
User
System
Problems of IVR system
• Synchronous vs. asynchronous communication
Synchronous
Visual Outputs
Mouse Input
time
User
System
Asynchronous
time
Audio
PressKey
User
System
WaitingPressKey
Waiting
Audio
Problems of IVR system
• Transition to expert use
Skill development
Ski
ll le
vel
Novice(Voice menu: recognition)
Problems of IVR system
• Transition to expert use
Skill development
Ski
ll le
vel
Expert(direct code access: recall)
Novice(Voice menu: recognition)
Problems of IVR system
• Transition to expert use
Skill development
Ski
ll le
vel
Expert(direct code access: recall)
Novice(Voice menu: recognition)
earPod’s approach
• Problem: speech is serial and slow
earPod’s approach
• Problem: speech is serial and slow– By-pass audio
earPod’s approach
• Problem: speech is serial and slow– By-pass audio – Use interruptible audio feedback
earPod’s approach
• Problem: speech is serial and slow– By-pass audio – Use interruptible audio feedback– Use non-speech audio
earPod’s approach
• Problem: asynchronous communication
earPod’s approach
• Problem: asynchronous communication– Synchronous communication (reactive
audio feedback)
Audio Outputs
Touchpad Input
time
User
earPod’s approach
• Problem: steep novice to expert transition
• Learning menu structure
Smooth transition
• Learning menu structure
• Learning expert gesture
Smooth transition
Target Item
• Learning menu structure
• Learning expert gesture
Smooth transition
Target Item Novice
• Learning menu structure
• Learning expert gesture
Smooth transition
Target Item Novice Novice/Expert
• Learning menu structure
• Learning expert gesture
Smooth transition
Target Item Novice Novice/Expert Expert
47Skill development
Ski
ll le
vel
Expert(direct tapping: recall)
Novice(glide browsing: recognition)
Support Single-hand Usage
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(Karlson et al, 2007)
Haptic guidance
Haptic guidance
earPod Design Summary
• Touch Input
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earPod Design Summary
• Touch Input• Reactive & Interruptible Audio
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earPod Design Summary
• Touch Input• Reactive & Interruptible Audio• Non-speech Audio
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earPod Design Summary
• Touch Input• Reactive & Interruptible Audio• Non-speech Audio• Input/Output Mapping
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earPod Design Summary
• Touch Input• Reactive & Interruptible Audio• Non-speech Audio• Input/Output Mapping• Direct Item Access
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earPod Design Summary
• Touch Input• Reactive & Interruptible Audio• Non-speech Audio• Input/Output Mapping• Direct Item Access• Transition to Expert Use
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Experiment
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• earPod vs. iPod-like linear menu
Experiment – visual condition
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Experiment – audio condition
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Experimental design
• Within-subject, counter-balanced• 12 participants x• 2 techniques (audio and visual) x• (40+80) items for the 2 menu
configurations (8 and 8x8) x • 4 blocks• = 11,520 menu selections in total.
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Results
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Block number Block number
Results
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Block number Block number
Results
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Block number Block number
Results
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Block number Block number
Results
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Results
• Detailed Log Analysis– 9/12 reached expert use (1 level menu)– 8/12 reached expert use (2 level menu)
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Results
• Detailed Log Analysis– 9/12 reached expert use (1 level menu)– 8/12 reached expert use (2 level menu)
• Subjective Feedback – 4 preferred earPod– 4 preferred iPod-like visual menu– 4 had no preferences– 11/12 suggest combine audio & visual
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earPod limitations
• Work with structured menu of limited breadth
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earPod limitations
• Work with structured menu of limited breadth
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Conclusion
• earPod: eyes-free menu selection for structured menu of limited breadth
• Performance comparable to iPod-like linear menus
• Support single-handed interaction• Design for mobile use
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Future Work
• Long/dynamic menus
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Future Work
• Long/dynamic menus
• Dual channel menu
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Future Work
• Long/dynamic menus
• Dual channel menu
• Dichotic listening (Ranjan et al., 2006)
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Future Work
• Long/dynamic menus
• Dual channel menu
• Dichotic listening (Ranjan et al., 2006)
• IVR on the phone
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AcknowledgementDanielle Lottridge, Tomer Moscovich, Mike McGuffin,
Jingnan Yang, Heather Thorne, Alvin Chin,
Derek Nowrouzezahrai, Yongchang Zhao, Lisa Min,
Andrew Chignell, Paula Gilverson, Michelle Qu,
Andrew McGutman, Noah Lockwood, John Chattoe,
Annie Xu, Silvia Gonzaloz, Anna Malandrino
Anonymous reviewers
Mobile Usage Design
• Stability issues
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earPod Novice to Expert Transition
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3 5
0
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