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WatchIt: Simple Gestures and Eyes-free Interaction for Wristwatches and Bracelets. S. Perrault , E. Lecolinet, J. Eagan , Y. Guiard Télécom ParisTech – LTCI CNRS UMR 5141. How to interact while …. … walking on a crowded street. … when your phone is hard to reach.

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watchit simple gestures and eyes free interaction for wristwatches and bracelets

WatchIt: Simple Gestures and Eyes-free Interaction for Wristwatches and Bracelets

S. Perrault, E. Lecolinet, J. Eagan, Y. Guiard

Télécom ParisTech – LTCI CNRS UMR 5141

microinteractions
Microinteractions
  • Named by [Ashbrook2010]
    • Quick (~3-4 secs)
    • Punctual
    • Short interruption
examples of microinteractions
Examples of Microinteractions
  • Reject call
  • Check messages
  • Check location
  • Check agenda/time
  • GPS Navigation
  • Manage music
  • Etc…
particular example music
Particular example: Music

10 commands + continuous control + list scrolling

on the wrist
On the Wrist!

~60% of women & ~40% of men wear bracelets or wristwatches every day.

many commercial products
Many Commercial Products
  • Permanently on the user
  • Easy to access

Pebble

I’m Watch

iWatch?

interaction on a wristwatch
Interaction on a Wristwatch
  • Occlusion
  • Fat finger problem
  • Input/output
    • Limited
    • Merged
existing solutions
Existing Solutions
  • Bezel
  • Back of device
  • Contactless
  • Device motion

Watchband?

[Ashbrook2008]

[Blasko2004]

[Baudisch2009]

[Harrison2009]

[Rekimoto2001]

novel solution interaction on the watchband
Novel Solution: Interaction on the Watchband
  • Large surface
  • Tactile feedback
  • Input/output separation
    • No occlusion
    • No fat finger problem

External band

Internal band

implementation the watchit prototype
Implementation: the WatchIt Prototype
  • Resistive technology
  • Advantages:
    • Low power
    • Few accidental activations
    • Not apparent
    • Cheap
  • Drawback:
    • 1 dimension only
interaction needs
Interaction Needs

10 commands + continuous control + list scrolling

eyes free interaction
Eyes-free Interaction

10 commands + continuous control + list scrolling

gestures technique
Gestures Technique
  • 3 pointing zones
    • Extremities
    • Large central zone
  • 2 sliding directions

Clasp

 Screen

  • Pinching

= (3+2)*3 = 15 gestures

External band

Internal band

audio menu technique
Audio Menu Technique
  • Inspired by earPod[Zhao2007]
  • Each band divided in 5 zones
  • 1 zone = 1 item
  • Continuous audio feedback

Apricot

Banana

Fig

Kiwi

Pear

« Apricot »

« Fig »

interaction evaluation
Interaction Evaluation

Are users able to perform many commands without looking at the device?

  • Gestures vs. Audio Menu
  • 8 participants
  • Accuracy & time
    • Time = reaction + travel + gesture
audio menu technique1
Audio Menu Technique
  • Accuracy 94%
    • No band effect
  • Time
    • Average 3.2s
    • Band effect

Accuracy (%)

External

Internal

2-contacts

Time (s)

External

Internal

2-contacts

22

gestures technique1
Gestures Technique
  • Band effect
    • Accuracy
    • Time
  • Comparison
    • Gestures faster
    • Menu + precise
list scrolling
List Scrolling

10 commands + continuous control + list scrolling

list scrolling evaluation
List Scrolling Evaluation

Are users able to scroll lists on the watchband quickly and precisely?

  • Navigation task
  • Touchscreenvs 2 techniques
technique relative scrolling on watchband
Technique: Relative Scrolling on Watchband
  • Same as scrolling on a screen
    • Pan
    • Flicking
  • More vertical space
technique absolute scrolling on watchband
Technique: Absolute Scrolling on Watchband
  • Mapping between:
    • List space (virtual)
    • Watchband space (physical)
  • Close to screen = Beginning
  • Close to clasp = End of list
  • Instant scrolling
  • Not very precise for long lists
experimental design
Experimental Design
  • Touchscreen active
    • Selection
    • Watchband as a complement
    • User preference & strategy
  • 3 list sizes (15/60/240 items)
  • 6 distances (5, 10, 20, 40, 80, 160 items)
  • 12 participants

D = 5 items

results
Results
  • Absolute scrolling
    • Faster on any list
  • Relative scrolling
    • Always slower
    • Friction?
interaction strategy
Interaction Strategy
  • Relative technique:
    • 1.02 pans/trial on screen
  • Absolute technique:
    • Fast imprecise on watchband
    • Corrections on screen (1.93/trial)
user preferences
User Preferences
  • Interaction on watchband
    • More comfortable
    • No occlusion
  • Favorite technique:
    • Absolute technique (9/12)
list scrolling findings
List Scrolling Findings
  • Hybrid technique?
    • Absolute for fast movement
    • Relative for adjusting
  • Augmented input space
    • Effective list scrolling
    • Appreciated by users
watchit takeaway message
WatchIt: Takeaway Message
  • Micro- and rich interactions
    • Many commands (10+)
    • Eyes-free interaction
    • List scrolling
  • Properties:
    • Increase input space
    • Input/output space separated
thank you questions
Thankyou! Questions?

The VIA team islooking for postdocs!