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Effects of Interventions Involving Speech Output Technologies on Communication Outcomes for Individuals With
Tiffany N Chavers1, Ralf W Schlosser2,3,4, Cissy Cheng1
1Department of Speech, Hearing, and Language Sciences, The University of Texas at Austin.
American Journal of Speech-Language Pathology
|August 15, 2022
Summary
This review found limited high-quality research on speech output technologies for developmental disabilities. More studies are needed to understand their impact on communication outcomes.
Area of Science:
- Augmentative and Alternative Communication (AAC)
- Developmental Disabilities Research
- Speech Technology Interventions
Background:
- Speech output technologies offer potential communication benefits for individuals with developmental disabilities.
- Existing literature on these interventions, particularly for non-autism spectrum disorders, requires comprehensive mapping.
- Understanding the current research landscape is crucial for guiding future evidence-based practices.
Purpose of the Study:
- To systematically map the existing literature on the effects of speech output technologies on communication outcomes.
- To identify research gaps and areas for future investigation in this field.
- To focus on individuals with developmental disabilities excluding autism spectrum disorder.
Main Methods:
- A scoping review methodology was employed to ensure a comprehensive and unbiased literature search.
- Searches were conducted across multiple electronic databases, supplemented by ancestry and forward citation searches.
- Studies published between 1991 and March 2021 were included, with data extracted on participants, designs, interventions, and outcomes.
Main Results:
- The review included 26 studies: 25 single-case experimental designs (88 participants) and 1 group design (62 participants).
- Participants frequently had multiple diagnoses, cerebral palsy, or Down syndrome.
- Most studies focused on requesting behaviors, with limited research on syntactic structure and word identification; a lack of high-quality studies was noted.
Conclusions:
- There is a significant paucity of high-quality research on the effectiveness of speech output technologies for children with developmental disabilities.
- The current evidence base necessitates further rigorous investigation to inform clinical practice.
- Several key directions for future research are identified to address existing knowledge gaps.
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