Abstract
Alternative and augmentative communication (AAC) involves the set of skills used by subjects with defective speech to improve communication. We discuss the complementary aspects of this multimodal approach, which relies on the symbolic and non-symbolic content of bodily, technical and behavioral adjustments. Learning non-standard communication skills implies that accompanying persons also learn these skills to modelize the alternative communication. Ergonometric and linguistic questions are crucial for correctly adapting the tools to each individual, the final goal being to facilitate communication while avoiding overly demanding motor and cognitive involvement.
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