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

    1. 1. 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
    2. 2. History: Touchscreen Interfaces Shneiderman, Sears MacKenzie Zhai Ren : Sketchpad Multi-Touch InteractionSutherland @MIT, 1963 1980’s ~ 1990’s Experiments Han @NYU, 2006 2
    3. 3. 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
    4. 4. Touchscreen Keyboard a fundamental application 4
    5. 5. 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
    6. 6. 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
    7. 7. CATKey: Customizable and Adaptable Touchscreen Keyboard with Bubble Cursor-like Visual Feedback 7
    8. 8. 1. Customizable Keyboard Standard QWERTY Key Layouts Customized Key Layouts 8
    9. 9. 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
    10. 10. 2. Adaptable KeyboardAutomatic (on-line) adaptation of key area based on user’s touch points (Himberg et. al., 2003) 10
    11. 11. 3. User-friendly Keyboard Provide the sensation of offset cursorA simple application of the bubble cursor (Grossman et. al., 2005) 11
    12. 12. 3. User-friendly Keyboard Bubble cursor like visual feedback 12
    13. 13. 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
    14. 14. 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
    15. 15. 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
    16. 16. 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
    17. 17. 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
    18. 18. 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
    19. 19. The optimum arrangement for …A quick brown fox jumps over the lazy dog Thank you ! 19

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