Applying a Developmental Model to Preliterate Aided Language Learning.

Childhood spoken language interventions and augmentative and alternative communication (AAC) interventions share a common purpose: maximizing communication and language outcomes. To ensure that interventions for children who require AAC also address expressive language acquisition, this clinical focus article focuses on how to apply a developmental model of language acquisition to guide AAC decision making for preliterate aided communicators, with a particular focus on vocabulary selection. A brief review of early expressive language development is presented, along with arguments for why relying on a developmental model to guide AAC decision making is so critical. A series of detailed examples of how to apply a developmental model to various AAC vocabulary selection approaches are provided, including analyses of how well each approach aligns with pragmatic, semantic, grammatical, and narrative development. No single AAC approach for preliterate AAC language learners adequately addresses both immediate and longer-term expressive language needs; every approach has both strengths and weaknesses. Clinical decision making requires an analysis of each approach to ensure that AAC service delivery teams clearly understand the inevitable linguistic gaps, with plans put into place to fill in those gaps with different approaches. Future efforts to improve preliterate AAC service provision should use a developmental model of language as a starting point, in combination with input from families, educators, and clinicians to ensure the feasibility of the chosen approaches.