Numeric Code - Answer-AAC coding technique in which a number stands for a word, phrase, or
sentence. Communicate quickly with fewer keystrokes
Abbreviation Expansion - Answer-AAC device automatically expands the abbreviation into the expanded
word. abd = abduction
Coverage Vocabularies - Answer-provide basic communication topics as well as concepts for people
who cannot spell - words, symbols, or pictures
Acceleration Vocabularies - Answer-intended to increase the rate of communication for people who can
spell - letter codes stand for words, phrases, and sentences
Semantic Encoding - Answer-pictures/symbols/icons represent words, phrases, and sentences. Icons
have potential for multiple meanings
Predictive Selection - Answer-Icon prediction feature used with scanning
Predictive Scanning - Answer-predictive approach based on the frequency with which certain letters
follow others in English
,Word Prediction and Word Completion - Answer-displays words or phrases a user is typing based on
what has already been typed
Fixed Predictive Devices - Answer-stored vocabulary that never changes - very predictable and helps the
user develop motor and cognitive patterns that make retrieval faster
Adaptive Predictive Devices - Answer-change the order of words keeping most frequently used words at
the top of the list
Eye-Controlled Communication Systems - Answer-for people with severe limb limitations but good eye
and head control.
Keyguard - Answer-cover made of plexiglass or plastic that fits over a keyboard for people who have
difficulty pressing the right key or who produce extra movements as they move key to key
Automatic Scanning - Answer-device presents available choices continuously. Users must be able to
wait for selection and activate accurately at the correct time
Step scanning - Answer-press switch to move from choice to choice. Must active another switch or wait
for acceptance time to elapse to choose. Motor fatigue has potential to be high with this method
Inverse Scanning - Answer-User holds switch to scan, releases to select
Instructions - Answer-ATPs should provide written instructions for all equipment and make sure it is
accessible to client, cognitively and physically. Provide supplemental instructions if necessary
Motor Skills Training Program (3 stages) - Answer-1. Activate switch and associate switch with result
2. Activate switch at a certain time consistently
3. Increase array that the user can consistently select in order to improve scanning selection skills
, HAAT - Answer-Human Activity/Assistive Technology Model
Human
Activity
Assistive Technology
Context - Answer-Operator using AT system properly?
Does the system allow user to meet goals for activity?
Does the system bridge the gap between the skills the consumer has and the skills needed for the
activity?
Does the system perform in the physical, social, and cultural environment?
Follow-up versus Follow-along - Answer-Follow up = activities that occur immediately after AT is
installed
Follow-Along = activities that occur over a longer time span, often over a life-time
Scanning - Answer-Most common type of INDIRECT selection in which consumer uses a switch to select
option when highlighted
Directed Scanning - Answer-user initiates scanning process then selects option with a joystick or other
switch. This is the fastest indirect selection method
Acceptance Time - Answer-the length of time a user pauses at a choice during directed scanning
Coded Access - Answer-selection method in which the user completes a sequence of movements as a
code for each item in a selection set
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