Teaching AAC-related skills Teaching a child to enjoy social encounters Some children do not like social encounters and will actively avoid them. This will serve to delay communication because communication requires interaction with others. Therefore, an early part of their communication program should include teaching them how to take pleasure from social engagement with others (Schweigert, 1989). The following techniques can be used to accomplish this.
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Teaching symbols After a child has mastered non-symbolic communication, such as requesting by pointing to or looking at desired objects, or pushing away unwanted objects, the next step is for the child to learn how to use symbols. Communicating with symbols allows the child to refer to objects and events that are not immmediately present (i.e. objects that are not physically present, and events that have already occurred or have yet to occur). Symbols are also necessary for the discussion of abstract concepts, and, thus, are essential in academic endeavors. Many children naturally gain an understanding of symbols as they develop cognitively. However, some children, in particular those who are severely cognitively impaired, may have to be explicitly taught symbols. (See Assessing intentionality, and the understanding of means-end, causality, and symbols, Issues with symbol systems, and Types of symbol systems.)
Some children easily confuse different symbols, especially those that are similar-looking. A child may be able to correctly use the first few symbols learned, but, as more are added, begin to mix them up or produce symbols at random. This suggests that the child is unable to remember the symbols well enough to distinguish them. One solution is, at least initially, to choose symbols that are sufficiently different from each other to allow the child to distinguish among them (Franklin, Mirenda, & Phillips, 1996). This means that some children will start out with symbols that differ greatly, while others can be taught symbols that are more similar in preparation for differentiating symbols that are very similar-looking (Reichle, York, & Sigafoos, 1991). Sometimes it is beneficial to give a child explicit practice in differentiating symbols, such as a symbol matching task Thorley, Ward, Binepal, & Dolan, 1991).
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Start with objects as symbols Van Tatenhove (1987) recommends starting with real objects when teaching symbols to children who are still pre-symbolic. (See Assessing intentionality, causality, means-end, and the understanding of symbols.)
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Communicating with pictures Once the child has mastered object-to-object representations, he or she can be taught more abstract symbols, such as picture symbols. (See Start with objects as symbols.) Again, pairs of identical objects are used initailly (Van Tatenhove, 1987).
OTHER RESOURCES:
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Communicating with sign language Sign language is another major symbol system. It is frequently taught using simultaneous communication, milieu teaching, and prompting and prompt-free strategies.
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Direct selection and scanning techniques Direct selection or scanning must be used when a child has to choose among an array of messages, as with, for example, communication boards or voice output communication aids (VOCAs), as opposed to directly producing the desired message such as with speech and sign language. In direct selection, the child independently locates and then activates the message. In scanning, the child waits while an external navigator, either another person or the device itself, moves through the messages highlighting each one separately. When the desired message is reached the child indicates or activates it. In general, direct selection is considered preferable to scanning since it has the potential to be faster. Scanning involves long waiting times during which the child must remain attentive and remember the intended message, increasing cognitive demands as well as the likelihood of fatigue and boredom (Ratcliff, 1994). Scanning is typically used with children with motor disabilities who are unable to push or touch one of a series of buttons or pictures, but are capable of activating a switch or indicating an affirmative to a partner. If it is unclear whether direct selection or scanning is preferable for a child, then both may be taught simultaneously. This is also a good idea if a child’s motor skills are degenerating such that he or she is currently capable of direct selection, but will lose that ability in the future. Scanning can be visual (e.g. pointing to each choice in a series), auditory (verbally labeling each choice) or both (for example, if each choice is verbally identified as well as pointed to). Using a combined visual and auditory scanning technique may enhance receptive (i.e. the child's ability to understand) as well as expressive language skills. Auditory scanning is considered more difficult than visual scanning for the following reasons:
Because of the difficulties inherent in auditory scanning, some children may always choose the first or the last item in the sequence to reduce the effort required, particularly during the learning stage. To prevent this, neutral items can be mixed with highly preferred items. In addition, the relative positions can be frequently changed, the list of items can be reduced in length, or auditory cues can be given (e.g. stating known preferred items in a louder voice) to help the child get started in using scanning (Light, 1993; Reichle, York, & Sigafoos, 1991). (See Prompts designed into the AAC.) OTHER RESOURCES:
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Scanning Reichle, York, & Sigafoos (1991) offer an excellent strategy for teaching a child how to scan utilizing a choice-making format. The assumption is that the child is a beginning communication board or voice output communcation aid (VOCA) user. If the child is also pre-symbolic, then real objects can be used. Prior to beginning teaching, a signal for yes or switch that the child will be using to indicate a preference must have already been established.
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Row-column scanning Row-column scanning can be taught by initially teaching the child how to scan through a vertically-positioned column of general-category items.
When the child is able to choose among these, more specific items can be added to the horizontal rows on the right. An example of such a communication board follows.
The child must learn to first choose only among the items vertically arranged in the left-most column. Once this choice is made, the child then has to focus only on the items in the horizontal row to the right of the initial selection (Reichle, York, & Sigafoos, 1991; Van Tatenhove, 1987).
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