Children with autism often experience substantial impairments in the domain of language and communication. Speech generating device (SGD) is one of the widely used augmentative communication systems with this population. The most prevalent speech output systems currently in use with SGDs are digitized and synthetic speech outputs. Advantages and disadvantages of each speech output system exist, and large individual differences in-terms of preference and performance have been speculated in both modalities. There is currently no published research that compares digitized and synthetic speech outputs. The primary goal of this study is to examine the effects of SGD training using digitized vs. synthetic speech outputs on the acquisition of requesting skills of 4 non-verbal children diagnosed with autism. The study addressed the following research questions. First, are there differences in acquisition rates for requests taught using digitized vs. synthetic speech outputs? Second, do children show a preference for one speech output over other? Finally, Are there any differences in perceived social validity of digitized vs. synthetic speech outputs? The primary findings of this study were: (1) Differences in the performance were found between two of the participants within each speech output; (2) two of the participants appeared to prefer one speech output over other and one participant could not indicate his preference due to positioning bias; (3) social validity measures indicated favorable ratings for SGD training but no clear indications in-terms of acceptability and usability of speech outputs across different settings. The overall results obtained from this study suggest that speech output can play a significant role, and it is one of the important components that can contribute to the success of the intervention. Additionally, overall outcome suggests that non-verbal children with autism can successfully learn to use the SGDs at their own pace with the support of proper prompting strategies and instructional procedures. / text

Thesis (M.A.)--Miami University, Dept. of Speech Pathology and Audiology, 2006. / Title from first page of PDF document. Document formatted into pages; contains [1], v, 45 p. : ill. Includes bibliographical references (p. 35-37).

Research has demonstrated a close relationship between verbal short-term (STM) and working memory (WM) and receptive language in children (Baddeley, Gathercole, & Papagno, 1998; Ellis & Sinclair, 1996). Few studies have examined the relationship between memory and language production, and these studies focus on STM only. Though correlations have been found between verbal STM and production, the nature of the correlations are unclear. The current study examined the possibility that receptive language mediates the relationship between memory and language production. Children between 3;0 and 5;11 were administered tests assessing receptive vocabulary, receptive grammar, expressive vocabulary, verbal STM, and verbal WM. Additionally, transcripts from free-play sessions were used to assess grammar production. A regression based analytic approach revealed STM and WM mediate the relationship between receptive language and productive language. The existence of these mediated relationships are discussed in relation to the role of working memory in the speech output buffer.

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Particularly in recent years, prompted by the need to gain greater independent access to a wider range of information, many persons who are blind make extensive use of screen access technology, optical character recognition devices, refreshable Braille displays and electronic notetakers in a variety of contexts. These reading and writing media have proved to be so useful and effective, raising debates in the literature on whether there is a decline in the use of Braille, or whether Braille as a reading and writing medium would become obsolete. Following a discussion on the development of tactual reading and writing media as part of an historical background to blindness, as well as an evaluation of the various reading and writing media used in South Africa by persons who are blind, this study, using a quantitative approach with a survey design, aimed to determine the impact of the various reading and writing media on the education and employment of persons who are blind. Based on the findings of the study, what emerges forcefully with regard to the preference of a medium for reading or writing is that a greater number of persons who are blind prefer Braille and computers with speech output. Notwithstanding this, there is support for the need to provide instruction in the use of the various reading and writing media, highlighting the critical value and role of the various media. Additionally, while persons who are blind appear to be convinced that computers will not replace Braille, they were, however, divided on whether there is a decline in the use of Braille, and whether computers would replace audiotapes. Finally, conclusions, based mainly on the findings of the study are drawn, and recommendations, both for future research, and for an integrated reading and writing model, are made. / Educational Studies / D.Ed.(Special Needs Educstion)

Particularly in recent years, prompted by the need to gain greater independent access to a wider range of information, many persons who are blind make extensive use of screen access technology, optical character recognition devices, refreshable Braille displays and electronic notetakers in a variety of contexts. These reading and writing media have proved to be so useful and effective, raising debates in the literature on whether there is a decline in the use of Braille, or whether Braille as a reading and writing medium would become obsolete. Following a discussion on the development of tactual reading and writing media as part of an historical background to blindness, as well as an evaluation of the various reading and writing media used in South Africa by persons who are blind, this study, using a quantitative approach with a survey design, aimed to determine the impact of the various reading and writing media on the education and employment of persons who are blind. Based on the findings of the study, what emerges forcefully with regard to the preference of a medium for reading or writing is that a greater number of persons who are blind prefer Braille and computers with speech output. Notwithstanding this, there is support for the need to provide instruction in the use of the various reading and writing media, highlighting the critical value and role of the various media. Additionally, while persons who are blind appear to be convinced that computers will not replace Braille, they were, however, divided on whether there is a decline in the use of Braille, and whether computers would replace audiotapes. Finally, conclusions, based mainly on the findings of the study are drawn, and recommendations, both for future research, and for an integrated reading and writing model, are made. / Educational Studies / D.Ed.(Special Needs Educstion)