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Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
Lecture 4 - Technologies for Communication
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Lecture 4 - Technologies for Communication

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  • 1. Technologies for Communication Lim Hua Beng & Patrick Ker Occupational Therapy School of Health Sciences
  • 2. Recommended Reading
    • Beaver, K.A. & Mann, W.C. (1995). Overview of technology for low vision. American Journal of Occupational Therapy, 49 (9), 913-921.
    • Kangas, K.A. & Llyod, L.L. (1988). Early cognitive skills as prerequisites to augmentative and alternative communication use: What are we waiting for? AAC Augmentative and Alternative Communication, 4 , 211-221.
    • Light, J. (1997). Communication is the essence of human life: Reflections on communicative competence. Augmentative and Alternative Communication, 13 , 61-70.
    • Rosenthal, S.B. (1995). Living with low vision: A personal and professional perspective. American Journal of Occupational Therapy, 49 (9), 861-864.
  • 3. Objectives
    • At the end of this lecture, students will be able to:
      • Describe the options and characteristics of augmentative and alternative communication
      • Describe technologies for people with sensory impairment
  • 4. Communication Impairment
    • Severe communication impairment – inability to meet their communication needs due to their disability
    • Augmentative communication – devices used to complement existing comunication abilities
    • Alternative communication – devices used by a person with no vocal ability
    • AAC – augmentative and alternative communication
  • 5. AAC
    • Low tech options
      • Communication boards/ displays
    • High tech options
      • Electronic communicaton devices, voice output communication devices
    • Multimodal communication
      • Using various modes to communicate eg. Low tech options and high tech options
    A high tech voice output device
  • 6. AAC Device Features
    • Input method
      • Spelling
      • Coverage vocabulary
      • Combination of both
    • Output method
      • Print
      • Visual display
      • Synthesised speech
      • Digitised speech (recorded human speech)
      • Combination
    Casio Palmtop Impact System With synthesised speech Spelling input Coverage Vocabulary
  • 7. AAC Device Features
    • Keyboard
      • Mechanical, membrane, touch screen, sensitivity adjustable
    • Display
      • QWERTY/ ABC
      • Coverage vocabulary
    • Screen
      • LCD, Number of lines, vacuum fluorescent, backlit
    The Dialect - Touch screen, coverage vocabulary, LCD voice output communication device
  • 8. AAC Device Features
    • Access method
      • Direct (e.g. pointing, optical head pointer)
      • Indirect (e.g. single or two switches, mouse/ mouse alternative, joystick)
    • Scanning method
      • Step, linear, row/ column, auditory feedback
    • Size/ Weight
      • Portability & mounting capability
    The DynaMyte
  • 9. AAC Device Features
    • Number of cells/ keys
    • Key/ cell size
    • Memory capacity
    • Type of vocabulary extension for coverage vocabulary system
      • Levels
      • Icon sequences
    LightWriter system using QWERTY mechanical keyboard With visual and voice output
  • 10. AAC Device Features
    • Acceleration methods
      • Word prediction
      • Abbreviations
    • Others
      • Interface with a computer
      • Includes ECU
      • Attach to regular printer
      • Word processing
    The DynaVox
  • 11. Role of the OT in AAC
    • To work with the speech therapist to determine:
      • Best means of accessing the device
      • Positioning of user and device
      • Customising the display, cell size and position
      • Maximising motor performance for efficiency in operating the device
      • Maximising visual perceptual performance

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