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Objective: To assess undergraduates' perceptions of three augmentative and alternative communication (AAC) modes. Method: We showed 104 undergraduates a video clip of a person using each of the three AAC modes and asked them to rate each option in terms of perceived (a) intelligibility, (b) ease of acquisition, (c) effectiveness/acceptability, and (d) preference. The three AAC modes shown were (a) manual signing, (b) picture exchange, and (c) speech-generating device. Results: Mean ratings for perceived intelligibility and effectiveness/acceptability were significantly higher for the speech-generating device. The speech-generating device and manual signing options were rated as being more preferred over picture exchange. Picture exchange was rated significantly higher on perceived ease of acquisition. Conclusion: Speech-generating devices were perceived to have greater social validity than manual signing and picture exchange. [ABSTRACT FROM AUTHOR]

Systematic reviews - that is, research reviews that are rigorous and follow scientific methods - are increasingly important for assisting stakeholders in implementing evidence-based decision making for children and adults with disabilities. Yet, systematic reviews vary greatly in quality and are therefore not a panacea. Distinguishing "good" reviews from "bad" reviews requires time and skills related to the appraisal of systematic reviews. The purpose of this chapter is to inform stakeholders (i.e., practitioners, administrators, policy makers) of evidence-based informa-tion sources that provide synopses (i.e., appraisals) of systematic reviews, to provide guidance in reading and interpreting the synopses of various sources, and to propose how to make sense of multiple synopses from different sources for the same systematic review. A secondary purpose of this chapter is to illustrate how stakeholders can conduct their own appraisals if synopses are not available. [ABSTRACT FROM AUTHOR]

Purpose: This article presents the results of a meta-analysis to determine the effect of augmentative and alternative communication (AAC) on the speech production of individuals with developmental disabilities. Method: A comprehensive search of the literature published between 1975 and 2003, which included data on speech production before, during, and after AAC intervention, was conducted using a combination of electronic and hand searches. Results: The review identified 23 studies, involving 67 individuals. Seventeen of these studies did not establish experimental control, thereby limiting the certainty of evidence about speech outcomes. The remaining 6 studies, involving 27 cases, had sufficient methodological rigor for the "best evidence analysis" (cf. R. E. Slavin, 1986). Most of the participants (aged 2-60 years) had mental retardation or autism; the AAC interventions involved instruction in manual signs or nonelectronic aided systems. None of the 27 cases demonstrated decreases in speech production as a result of AAC intervention, 11% showed no change, and the majority (89%) demonstrated gains in speech. For the most part, the gains observed were modest, but these data may underestimate the effect of AAC intervention on speech production because there were ceiling effects. Conclusions: Future research is needed to better delineate the relationship between AAC intervention and speech production across a wider range of participants and AAC interventions. [ABSTRACT FROM AUTHOR]

Abstract: Augmentative and alternative communication (AAC) as an area of clinical and educational practice involves a myriad of decisions related to the symbols, devices, and strategies from which each client must choose. These decision-making points can be productively informed through evidence from comparative intervention studies. The purpose of this review was to synthesize comparative AAC intervention studies using single-subject experimental designs involving participants with developmental disabilities. Following a systematic search, each qualifying study was reviewed in terms of a priori determined appraisal criteria, and summarized in tabular format. Studies were divided into three groups according to their study of aided approaches, unaided approaches, or a combination of both. Results are discussed in terms of methodological adequacy of the studies and their implications for future research and practice. [Copyright &y& Elsevier]

Presents a response by Ralph W. Schlosser to a review of his book on meta-analysis of single-subject research, published in the "International Journal of Language and Communication Disorders."

In this systematic replication of a previous study (R. W. Schlosser, D. M. Blischak, P. J. Belfiore, C. Bartley, & N. Barnett, 1998), the effects of speech and print feedback on spelling performance were evaluated. Four children with autism and no functional speech were taught to spell words with a speech-generating device under 3 feedback conditions. In the auditory-visual condition, children received both speech and print feedback, whereas in the auditory and visual conditions, only 1 type of feedback was provided. An adapted alternating treatments design was used. All 4 children reached criterion across conditions. Although 3 children reached criterion first with print or speech-print feedback, 1 child was most efficient with speech-print followed by speech feedback. Based on the findings of both studies, 2 distinct profiles of feedback efficiency are proposed. Children that exemplify the primarily visual profile spell words most efficiently when feedback involves print. Children that fit the auditory profile spell words most efficiently when feedback involves speech. The implications for understanding the learning characteristics of children with autism, as well as those for practice and further research are derived. [ABSTRACT FROM AUTHOR]

For individuals with little or no functional speech, the ability to spell is critical in generating spontaneous, novel utterances. The purpose of this article is to discuss evidence regarding the role of speech-generating devices (SGDs) and talking word processing software in supporting independent spelling in children with autism. Implications for understanding the learning characteristics of children with autism and discussion regarding practice and future research are derived. [ABSTRACT FROM AUTHOR]

Speech output from speech-generating devices (SGD) and SGD software, such as talking word processors, has changed the landscape of options for aided communication. The purpose of this paper is to review and critique research into the roles of speech output for communication partners, learners, and learner-partner dyads. Research on partner oriented roles is reviewed in terms of attitudes and perceived communicative competence, and communicative behavior. Learner-oriented roles of speech output are summarized in terms of graphic symbol learning, communicative functions and social regulation, learner preference, challenging behaviors, natural speech production, comprehension, and literacy. Roles for the learner partner dyad include changes to interaction patterns. Methodological issues are discussed and practical implications are drawn where appropriate. Finally, directions for future research are proposed. [ABSTRACT FROM AUTHOR]

The establishment of an initial request lexicon is often targeted when introducing augmentative and alternative communication systems to beginning communicators. For many of these individuals, graphic symbols provide an effective way to communicate requests to others. Because there are literally dozens of graphic symbol sets and systems to choose from, interventionists face the dilemma of selecting those that are deemed appropriate. This article integrates theory and research concerning the selection of graphic symbols for an initial request lexicon. Directions for further research are articulated, and, when the evidence permits, suggestions for clinical practice are offered. [ABSTRACT FROM AUTHOR]

The degree to which an independent variable is implemented as intended has come to be known as "treatment integrity." The purpose of this article is to substantiate the crucial role of treatment integrity in (a) establishing a science of intervention research in augmentative and alternative communication and (b) assisting practitioners to engage in evidence-based practice and to evaluate the outcomes of everyday interventions. A treatment integrity checklist is introduced to assist interventionists in planning, implementing, and evaluating treatment integrity. Given its importance, treatment integrity needs to be given considerable weight in publication decisions. [ABSTRACT FROM AUTHOR]

Many children with autism spectrum disorder (ASD) demonstrate poor comprehension of language at the sentence level in both the spoken modality and the graphic symbol modality. This study explored whether children with ASD are able to follow directives when presented with a graphic symbol sentence that includes an animated symbol for a verb. A total of five participants with moderate-to-severe ASD were presented with 10 graphic symbol sentences and asked to perform the directive using the provided figurines/objects. Results demonstrated that children with ASD can correctly carry out full-sentence directives to varying degrees when the directives represented graphically include an animated verb. Several observations were noted pertaining to participants' performance and autism severity. The results of this study may have important implications for using animation as a tool to facilitate symbol syntax comprehension. [ABSTRACT FROM AUTHOR]

The authors present their views on evidence-based practice (EBP) in speech-language pathology. They identify specific actions that professionals could implement within their organization to develop a culture of EBP around communication assessment and intervention including seminars and journal clubs. They also mentioned the benefits of subscribing to evidence-based communication assessment and intervention.

The article introduces the first issue of the journal "Evidence-Based Communication Assessment and Intervention."

Purpose: The purpose of this study was to determine the effects of augmentative and alternative communication (AAC) intervention using a speech-generating device (SGD) on acquisition, maintenance, and generalization of multistep requesting and generic small talk in three children with severe autism spectrum disorder (ASD) between the ages of 7 and 13 years. Method: A multiple-baseline design across participants combined with a posttreatment multiple-generalizationprobe design was used to assess acquisition, generalization, and maintenance of target communicative behaviors with the experimenter and the participants’ familiar communication partners (FCPs). Intervention was composed of systematic instruction in the use of an SGD using least-to-most prompting, constant time delay, error correction, and reinforcement. Results: Visual analysis established a strong functional relationship between the independent variable and the two dependent variables (i.e., requesting preferred activities, engaging in generic small talk) for all three participants. Effect size indicator analyses corroborated these findings, indicating strong effects for performing multistep requesting and medium effects for engaging in generic small talk. All participants were able to generalize the acquired communicative behaviors to request new and untrained snacks and activities and engage in generic small talk with FCPs who were not part of the training. Maintenance of acquired communicative behaviors was demonstrated 3 weeks post completion of intervention. Conclusion: This study provides preliminary evidence that AAC intervention using an SGD and incorporating leastto-most prompting, constant time delay, error correction, and reinforcement is effective in terms of multistep requesting and generic small talk behaviors in children with severe ASD. [ABSTRACT FROM AUTHOR]

For this study, 11 children with moderate to severe autism spectrum disorder (ASD) were given directives containing prepositions in three cue conditions: (a) spoken alone, (b) a short video clip along with spoken cues, and (c) a sequence of three graphic symbols accompanied by spoken cues. Participants followed directives significantly more accurately with the video clip than with spoken cues only, and significantly more accurately with spoken cues only relative to the sequence of graphic symbols. Results suggest that the short video clip along with spoken cues may be an optimal mode for enhancing learners' ability to follow directives containing prepositions. In addition, results reveal three statistically significant correlations between participants' preexisting skills and directive-following accuracy: a positive correlation between spoken preposition preassessment total score and accuracy in the spoken-alone condition; a positive correlation between spoken noun preassessment total score and accuracy in the video-clip condition; and a positive correlation between ASD severity and the need for repetition in the video-clip condition. Results also suggested that, for children with more severe ASD symptoms, the video clips require repetitions so that the relationships illustrated within it can gain more semantic salience. Implications for clinical practice and future research are discussed. [ABSTRACT FROM AUTHOR]