Augmentative and alternative communication (AAC) refers to a range of methods and strategies to support verbal language (speech). These may include simple systems such as gesture and pointing or high-tech devises, such as computer technologies.
AAC may include:
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Natural gesture and body language (e.g. pointing, eye gaze, facial expression)
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Signing
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Objects of reference (objects relating to daily routines and activities)
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Alphabet or word boards
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Choosing boards
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Talking mats
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Communication books with photos/symbols
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Visual timetables and schedules
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PECS (Picture Exchange Communication System)
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Voice Output Communication Aids (VOCAs)
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Switches (buttons which when pressed play a pre-recorded message and/or activate a toy)
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Tablets and computer technologies
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Eye gaze technology
AAC is introduced to support the communication of those who cannot effectively communicate through verbal means. This may be a temporary support or long-term solution and AAC approaches should be considered on an individual basis. It is important to note that AAC is rarely, if ever, introduced as a replacement for speech, but a supportive strategy to aid effective communication.
When working with young children I mostly adopt a ‘total communication’ approach. This involves introducing a range of the above strategies to support a child’s attention and listening, understanding and expressive communication.
Useful Links:
http://www.communicationmatters.org.uk/page/what-is-aac
https://www.abilitynet.org.uk/aac/