Interact2007c
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Interact2007c

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  • Shneiderman (1991), Sears et. al. (1993) が正しいのでは? 後者では 1:1/2 となっている. エキスパートによるハードウェアキーボード: 58 wpm (前者より) ソフトウェアキーボードのサイズを最適化して: 32.5 wpm (後者より)

Interact2007c Interact2007c Presentation Transcript

  • CATKey: Customizable and Adaptable Touchscreen Keyboard with Bubble Cursor-like Visual Feedback Kentaro Go, Yuki Endo* Interdisciplinary Graduate School of Medicine and Engineering Department of Computer Science and Media Engineering University of Yamanashi *HAL LaboratoryINTERACT 2007 1
  • History: Touchscreen Interfaces Shneiderman, Sears MacKenzie Zhai Ren : Sketchpad Multi-Touch InteractionSutherland @MIT, 1963 1980’s ~ 1990’s Experiments Han @NYU, 2006 2
  • Touchscreen Application Public Terminals Private Devices iPhone, iPod touch Nintendo DS PDA, Mobile phone Table-size Shared DevicesTicketing machine, ATM Information KIOSK Microsoft Surface 3
  • Touchscreen Keyboard a fundamental application 4
  • Text Entry with Touchscreen Keyboard 1 The input speed is about of hardware keyboard 2 (Shneiderman, 1991; Sears et. al., 1993) Hardware Touchscreen keyboard keyboard > 1 1 5 2
  • The CATKey project• Goal: Increase the usability of touchscreen keyboards with fingers• Approach: Design a touchscreen keyboard, which has 1. Customizable, 2. Adaptable, functions 3. User-friendly 6
  • CATKey: Customizable and Adaptable Touchscreen Keyboard with Bubble Cursor-like Visual Feedback 7
  • 1. Customizable Keyboard Standard QWERTY Key Layouts Customized Key Layouts 8
  • 1. Customizable Keyboard Maximize each key area = Voronoi Diagram (Himberg et. al., 2003) W E R I O T Y U P Q D S F K G H J A L X C V B N M Z SPACE 9
  • 2. Adaptable KeyboardAutomatic (on-line) adaptation of key area based on user’s touch points (Himberg et. al., 2003) 10
  • 3. User-friendly Keyboard Provide the sensation of offset cursorA simple application of the bubble cursor (Grossman et. al., 2005) 11
  • 3. User-friendly Keyboard Bubble cursor like visual feedback 12
  • Evaluation• Ten students (male: 8, female: 2)• Hardware keyboard vs. QWERTY touch screen keyboard vs. CATKey• Input forty pangrams – Example: a quick brown fox jumped over the lazy dog• Text entry speed and Error rate 13
  • Text Entry Speed in words per minute (wpm)Text entry speed (wpm) 60 50 40 33.5 (10.3) 30 23.8 (4.6) 22.3 (4.7) 20 10 0 Hardware KBD QWERTY CATKey Touchscreen keyboard No significant difference 14
  • Error Rate 10 9 8 7 6.8 (2.8) 5.9 (1.8)Error rate (%) 6 5 4 3.4 (1.9) 3 2 1 0 Hardware KBD QWERTY CATKey Touchscreen keyboard No significant difference 15
  • Users’ comments from Interview• Positive comments – I did not need to move my hands back and forth. – In the Voronoi keys, the outside keys are lager in area than the inside keys. It makes me type in very easily. – I arranged the keys, that I am not good at typing in, the easier positions to type in. It was good.• Negative comments – Some keys are over-adjusted. They became smaller than I expected. 16
  • Conclusion• CATKey: Customizable and Adaptable Touchscreen Keyboard with Bubble Cursor-like Visual Feedback• Goal: Increase the usability of touchscreen keyboards with fingers• Approach: Design a customizable, adaptable, user-friendly touchscreen keyboard 17
  • Future work• Conduct further experiments on the usability of CATKey• Deal with the over-adjustment problem• Explore key arrangements: Metropolis arrangement Japanese arrangement (Zhai et. al., 2000) Consonant Vowel 18
  • The optimum arrangement for …A quick brown fox jumps over the lazy dog Thank you ! 19