Language acquisition in young AAC system users: issues and directions for future research

This paper explores three questions regarding the development of language in young children with severe speech impairments who require augmentative and alternative communication (AAC). The first question relates to how the process of language learning through augmented modes unfolds. In attempting to address this question, two issues are discussed: (1) the need for developing a methodology to describe this unfolding and (2) the impact of voice output communication aids (VOCAs) with prestored messages on this unfolding. The second question relates to the theoretical constructs underlying this process. An example of applying a model of normal language acquisition in conjunction with Vygotsky's construct of the Zone of Proximal Development (ZPD) to the longitudinal study of language acquisition in a child is provided. The final question pertains to the conditions that may best facilitate the language acquisition process. One particular natural context, that of interactive storybook reading, is examined as a ...

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