Augmentative and alternative communication (AAC) refers to strategies and techniques used by individuals who experience communication difficulties because they have little or no functional speech. AAC can support (i.e., augment) speech or it can provide a replacement (i.e., act as an alternative) for spoken communication. In addition to supporting expressive communication in adults and children, AAC can also support the development of language and even natural speech in children. People who use AAC are a diverse group, as communication disorders can result from congenital disability (e.g., cerebral palsy, autism, Down Syndrome, and developmental delay), acquired disability (e.g., stroke, also…
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