08 10 Interaccao

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  • 08 10 Interaccao

    1. 1. Acessibilidade Móvel Soluções para Deficientes Visuais Hugo Nicolau [email_address]
    2. 3. ‘‘ ’’ Never doubt that a small group of committed people can change the world. Indeed it is the only thing that ever has . — Margaret Mead
    3. 4. We have the whole world in our hands.
    4. 5. SMS have had an enormous growth in the last few years.
    5. 6. Mobile devices can do anything.
    6. 7. A common image for me.
    7. 8. What about the Others ?
    8. 9. Some can only see this.
    9. 11. They are too heavy .
    10. 12. They are too big .
    11. 13. They are too expensive ...
    12. 14. And definitely not mobile .
    13. 16. Can speech synthesis replace visual feedback ?
    14. 20. Despair and drop out.
    15. 22. User Observation
    16. 23. Survey users’ habits and capacities User characterization Mobile Device usage User Observation
    17. 24. All dial numbers All have a cell phone 2 users stated difficulties with keypad Not a priority
    18. 25. 50% of the users can send messages … but 80% have a Screen Reader Difficulties with menu navigation and.. ...voice feedback
    19. 26. Half the users use the contact list Memorize the contact position
    20. 27. T h e Goal Mobile Device Control for Blind Individuals
    21. 28. Design Guidelines
    22. 29. G1 communicate through available channels
    23. 30. G2 low cognitive load
    24. 31. G3 focus on acquired capabilities
    25. 32. G4 minimize stress scenarios
    26. 33. G5 adapt the interaction processes to the user
    27. 34. G6 allow and stimulate performance improvement
    28. 35. G7 available, adaptable and affordable
    29. 36. Calls Info Dial Accept Reject
    30. 37. SMS Write Read Send Receive
    31. 38. Contacts Calendar Notebook
    32. 39. <ul><li>? </li></ul>
    33. 40. Keep it Simple.
    34. 41. BrailleTap NavTap NavTouch
    35. 42. B C D F G H J K L M N P Q R S T V W X Y Z A E I O U
    36. 43. A B C D E F G H I J L M N O P Q R S T U V X Z
    37. 44. A B C D E F G H I J L M N O P Q R S T U V X Z
    38. 45. A B C D E F G H I J L M N O P Q R S T U V X Z A BCD E FGH I JLMN O PQRST U VXZ
    39. 46. We can navigate in any direction.
    40. 47. A BCDEFGHIJLMNOPQRSTUVX Z
    41. 48. A B C D E F G H I J L M N O P Q R S T U V X Z
    42. 50. A B C D E F G H I J L M N O P Q R S T U V X Z
    43. 52. A B C D E F G H I J L M N O P Q R S T U V X Z
    44. 53. No wrong choices. Just shorter paths.
    45. 54. No memorization required.
    46. 56. (Almost) all mobile devices.
    47. 57. NavTouch
    48. 59. BrailleTap A Q B R
    49. 62. Invert Space Delete Back Menu Go
    50. 63. Al a g e h i Automatic Word Finishing Letter Prediction System Context Dictionaires
    51. 64. Vídeo
    52. 67. User Evaluation NavTap Method Raquel and Martin Sain Foundation Excellent learning curve compared with MultiTap Easy to learn
    53. 68. User Evaluation NavTouch Method Raquel and Martin Sain Foundation Easy and Fun Shorter paths than NavTap
    54. 69. User Evaluation Braille Matrix Method Raquel and Martin Sain Foundation Better than Vowel Navigation for braille experts (> 3 WPM) Requires Braille knowledge
    55. 70. Session Rate Error Rate
    56. 71. Minimum String Distance Error Rate Session Rate
    57. 72. Keystrokes per Character Session KSPC
    58. 73. Words Per Minute Session WPM
    59. 74. Remarks All the users were satisfied Improved performance All succeeded Before BloNo: 50% weren’t able to write text Wrote text Managed Contacts Navigated menus
    60. 75. The Future Gestural Shortcuts Long Term Studies Usability Issues
    61. 76. Kevin Clarkson Martin Rotovnik
    62. 77. Acessibilidade Móvel Soluções para Deficientes Visuais Hugo Nicolau [email_address]

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