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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. 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

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  1. 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

  2. How to interactwhile…

  3. …walking on a crowdedstreet

  4. …whenyour phone is hard to reach

  5. …if youneed to pay attention to yoursurrounding

  6. Microinteractions • Named by [Ashbrook2010] • Quick (~3-4 secs) • Punctual • Short interruption

  7. Examples of Microinteractions • Reject call • Check messages • Check location • Check agenda/time • GPS Navigation • Manage music • Etc…

  8. Particular example: Music 10 commands + continuous control + list scrolling

  9. Where to performMicrointeractions?

  10. On the Wrist! ~60% of women & ~40% of men wear bracelets or wristwatches every day.

  11. Many Commercial Products • Permanently on the user • Easy to access Pebble I’m Watch iWatch?

  12. Interaction on a Wristwatch • Occlusion • Fat finger problem • Input/output • Limited • Merged

  13. Existing Solutions • Bezel • Back of device • Contactless • Device motion Watchband? [Ashbrook2008] [Blasko2004] [Baudisch2009] [Harrison2009] [Rekimoto2001]

  14. Novel Solution: Interaction on the Watchband • Large surface • Tactile feedback • Input/output separation • No occlusion • No fat finger problem External band Internal band

  15. Interaction on a Watchband MOCKUP

  16. Implementation: the WatchIt Prototype • Resistive technology • Advantages: • Low power • Few accidental activations • Not apparent • Cheap • Drawback: • 1 dimension only

  17. Interaction Needs 10 commands + continuous control + list scrolling

  18. Eyes-free Interaction 10 commands + continuous control + list scrolling

  19. Gestures Technique • 3 pointing zones • Extremities • Large central zone • 2 sliding directions Clasp  Screen • Pinching = (3+2)*3 = 15 gestures External band Internal band

  20. 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 »

  21. 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

  22. 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

  23. Gestures Technique • Band effect • Accuracy • Time • Comparison • Gestures faster • Menu + precise

  24. List Scrolling 10 commands + continuous control + list scrolling

  25. List Scrolling Evaluation Are users able to scroll lists on the watchband quickly and precisely? • Navigation task • Touchscreenvs 2 techniques

  26. Technique: Relative Scrolling on Watchband • Same as scrolling on a screen • Pan • Flicking • More vertical space

  27. Relative Scrolling Video

  28. 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

  29. Absolute Scrolling Video

  30. 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

  31. Results • Absolute scrolling • Faster on any list • Relative scrolling • Always slower • Friction?

  32. Interaction Strategy • Relative technique: • 1.02 pans/trial on screen • Absolute technique: • Fast imprecise on watchband • Corrections on screen (1.93/trial)

  33. User Preferences • Interaction on watchband • More comfortable • No occlusion • Favorite technique: • Absolute technique (9/12)

  34. List Scrolling Findings • Hybrid technique? • Absolute for fast movement • Relative for adjusting • Augmented input space • Effective list scrolling • Appreciated by users

  35. WatchIt: Takeaway Message • Micro- and rich interactions • Many commands (10+) • Eyes-free interaction • List scrolling • Properties: • Increase input space • Input/output space separated

  36. Thankyou! Questions? The VIA team islooking for postdocs!

  37. Mappingfromvocabulary to music

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