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25 Cards in this Set
- Front
- Back
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What is the selections set?
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The visual, auditory, and tactile presentation of all messages, symbols, and codes available at one time to an AAC user.
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Braille is an example of what kind of display?
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Tactile display
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What is a fixed display?
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Any display in which the symbols and items are "fixed" in a particular location.
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When are fixed displays typically used?
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Low tech boards and in some SGDs
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What are some limitations to fixed displays?
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Difficulty with portability, inefficiency, limited number of symbols
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What is an example of a fixed display SGD?
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TechTalk, TechSpeak, Cheap Talk 8, Parakeet 15, Macaw, DigiCom 2000, Easy Talk, and Message Mate
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What is a dynamic display?
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Computer screen display with electronically produced visual symbols that, when activated, automatically change the selection set on the screen to a new set of programmed symbols
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What is most helpful about a dynamic display?
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Easy to use-- straightforward click on one item and get a set of subcategories
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What is a hybrid display?
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Electronic fixed displays with a dynamic component (e.g. indicator lights to inform the user which sets are available to activate)
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What are some AAC devices that use a hybrid display?
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Chatbox and the PAthfinder
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Why did AAC specialists design hybrid displays?
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As a memory aid particularly for people who use numerous icon sequences for communication
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What is a visual scene display?
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A picture, photo, or virtual environment representing a situation, place, or experience
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An AAC user selects a scene representing "Birthday Party." Guest names, party items, etc. then appear. Which type of display is this an example of?
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Visual scene
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Who can use a visual scene display
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Illiterate users such as children with DD, young adults with multiple disabilities, and adults with aphasia
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How should intervention decisions be based when choosing a display?
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Among the cognitive, language, sensory, and motor capabilities of the AAC user and the characteristics of the AAC technique
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How can we decide the number of items to put on the display?
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How many are required by the AAC user, what type of encoding strategy is used, type of device, etc.
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When symbols other than those representing letters or codes are used exclusively, the size of the selection set (increases/decreases) with the number of messages. Why?
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Increases because there is a one-to-one correspondence between messages and symbols
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Hoe many messages would be required for 500 messages, typically?
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500 messages
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What two issues regarding size of display should be considered when making selection set decisions?
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Individual item size and overall display size
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What determines the actual size of the symbols or messages on a display?
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The AAC user's visual capabilities, the motor access technique employed, the type of symbol, and the number of items to be displayed.
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What determines the spacing and arrangement of items on a visual/tactile display?
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The visual and motor capabilities of the AAC user
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What is orientation of display?
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Refers to the position of the display relative to the floor
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Why does orientation of display matter?
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Depending on selection type, the AAC user will need to touch or use a device to physically select so the device will need to be close enough to comfortably and physically do this. Also, being able to see the display is important
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What are examples of communication board displays in regards to spacing/arranging?
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A curved array positions items in an arch for a head pointer; some users prefer items to be farther apart and some prefer closer together, etc.
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With an auditory display, how is the size of the display determined?
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By the AAC user's memory and ability to retain the organizational scheme of the display
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