Methodological advances, opportunities, and challenges in AAC research

A scoping review of AAC interventions for children and young adults with simultaneous visual and motor impairments: Clinical and research Implications

Individuals with multiple disabilities are among the most challenging to serve and AAC teams often lack direction in determining effective interventions. The purpose of this scoping review was to summarize the research evidence on AAC interventions for individuals with complex communication needs and simultaneous motor, and visual impairments as part of their multiple disabilities; to consider implications for practice; and to determine gaps and directions for future research. A total of 27 studies were identified and reviewed, involving 55 unique participants with multiple disabilities. Most studies focused on direct intervention to increase requesting or choice-making, with little focus on social communication. Only two studies focused on training communication partners. Results indicated that AAC interventions can be highly effective to increase communication for individuals with multiple disabilities. However, there is an urgent need for increased rigor and more detailed participant information in future AAC intervention research with this population. Future research should investigate AAC intervention to improve social communication and increase language development, not just expression of needs and wants. Future research should focus on the needs of individuals with multiple disabilities from culturally and linguistically diverse backgrounds and on implementation of AAC within natural environments.

The application of the family of participation-related constructs (fPRC) framework to AAC intervention outcomes in children with complex communication needs: a scoping review

Participation is a fundamental human right, and being able to communicate is an essential component of participation in various life situations, such as at school, with peers, and in the community. Augmentative and alternative communication (AAC) interventions aim to facilitate communication and social interaction, independence, and participation in all aspects of life. The purpose of this study was to summarize and map the AAC intervention outcomes for children with complex communication needs onto the Family of Participation-Related Constructs (fPRC) framework. The scoping review identified 270 studies for inclusion, and the data gathered was extracted and mapped onto the fPRC framework. The results indicate that although many studies have reported on participation-related constructs such as activity competence and context, there is still insufficient focus on attendance and involvement, sense of self, and environment constructs. Hence, future research in the field of AAC is needed on the various constructs of participation proposed by the fPRC framework.

Predictors for Augmentative and Alternative Communication Clinical Service Provision: Closing the Gap

PURPOSE

At the core of the clinical services provided by a speech-language pathologist (SLP) is upholding the human right to communicate. Augmentative and alternative communication (AAC) modalities support communication across environments by offering temporary or permanent solutions. Barriers to AAC service provision include translation of knowledge into clinical practice, which remains problematic despite changes to AAC preservice training addressing the knowledge barrier. This study aims to understand the importance of factors impacting the provision of AAC clinical services.

METHOD

From the survey data of SLPs (N = 530) regarding current AAC service delivery practices, barriers, and professional development preferences in the United States, a hierarchical multiple regression identified the importance between individual and clinical practice variables of knowledge and current use of AAC modalities. A binomial logistic regression predicted the probability of one or more independent variables for barriers to AAC service delivery and learning preferences for AAC-related professional development.

RESULTS

The factors impacting SLPs' knowledge and barriers to practice are related to clinical practicum experiences. Engagement in AAC-related continuing education (CE) is the primary contributor to the use of AAC service provision. Predictors for barriers to AAC clinical provision are associated with clinical practicum experiences, the average number of patients seen weekly, and geographic region. Preference for CE topics and frequency depend on the work setting.

CONCLUSIONS

Hands-on clinical practicum experience addresses opportunity barriers in AAC service provision, contributing explicitly to the value of collaboration in AAC service delivery and highlights the importance of evidence-based professional development content. The findings from this study are reassuring in that clinicians are using AAC and suggest that high-quality professional development is an effective means to address the gap between knowledge generation and translation in the field.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.23202170.

Attributes of communication aids as described by those supporting children and young people with AAC

BACKGROUND

Those supporting children and young people who use augmentative and alternative communication (AAC) contribute to ongoing complex decision-making about communication aid selection and support. Little is known about how these decisions are made in practice and how attributes of the communication aid are described or considered.

AIMS

To understand how communication aid attributes were described by those involved in AAC recommendations and support for children and young people, and how these attributes were described as impacting on AAC use.

METHODS & PROCEDURES

A secondary qualitative analysis was completed of interview and focus group data from 91 participants involved in the support of 22 children and young people. Attributes of communication aids described by participants were extracted as themes and this paper reports a descriptive summary of the identified software (non-hardware) attributes.

MAIN CONTRIBUTION

Decisions were described in terms of comparisons between commercially available pre-existing vocabulary packages. Attributes related to vocabulary, graphic representation, consistency and intuitiveness of design, and ease of editing were identified. Developmental staging of vocabularies, core and fringe vocabulary, and vocabulary personalization were attributes that were described as being explicitly considered in decisions. The potential impact of graphic symbol choice did not seem to be considered strongly. The physical and social environment was described as the predominant factor driving the choice of a number of attributes.

CONCLUSIONS & IMPLICATIONS

Specific attributes that appear to be established in decision-making in these data have limited empirical research literature. Terms used in the literature to describe communication aid attributes were not observed in these data. Practice-based evidence does not appear to be supported by the available research literature and these findings highlight several areas where empirical research is needed in order to provide a robust basis for practice.

WHAT THIS PAPER ADDS

What is already known on the subject Communication aid attributes are viewed as a key consideration by practitioners and family members in AAC decision-making; however, there are few empirical studies investigating language and communication attributes of communication aids. It is important to understand how those involved in AAC recommendations and support view communication aid attributes and the impact different attributes have. What this paper adds to existing knowledge This study provides a picture of how communication aids are described by practitioners and family members involved in AAC support of children and young people. A range of attributes is identified from the analysis of these qualitative data as well as information about how participants perceive these attributes as informing decisions. What are the potential or actual clinical implications of this work? This study provides a basis on which practitioners and others involved in AAC support for children and young people can review and reflect on their own practice and so improve the outcomes of AAC decisions. The study provides a list of attributes that appear to be considered in practice and so also provides a resource for researchers looking to ensure there is a strong empirical basis for AAC decisions.

Expressive and receptive performance with graphic symbol sentences by individuals who use aided communication

This study explored performance on expressive and receptive graphic symbol tasks and spoken comprehension by individuals who use augmentative and alternative communication (AAC) as well as the relationship of performance with participants' skills and characteristics. Participants were 19 children and youth (aged 5- to 18-years-old) who used aided communication. Four experimental tasks were administered, with either speech or symbols as input (stimuli) and symbols or choice from an array of pictures as output (response). Symbols were not accompanied by written or spoken labels in the tasks. Measures of receptive vocabulary, receptive syntax, memory, and visual cognitive skills as well as information regarding participant characteristics were collected. There were strong relationships among all experimental tasks. Cluster analysis revealed different response patterns that may suggest a progression in expressive and receptive performance with graphic symbol sentences. Individual differences in receptive language, particularly receptive syntax, were related to task performance. The findings suggest that different ways of experiencing symbols, in addition to spoken comprehension of the sentences and receptive spoken language more generally, may contribute to expressive graphic symbol sentences. Performance on receptive symbol tasks may uncover a level of facility with the graphic-symbol modality not observed through expressive symbol use in communicative situations.

Planning for Implementation Science in Clinical Practice Research: An Augmentative and Alternative Communication Example

PURPOSE

Most evidence-based clinical research findings in communication sciences and disorders never achieve full implementation by practicing clinicians. To address this almost universal problem, this tutorial focuses on the initial planning steps of including implementation methodologies as part of clinical practice research programs. Integrating the principles and methodologies of implementation science can shift the current reality, leading to better uptake of evidence-based interventions.

METHOD

A step-by-step approach to integrating implementation science into new or existing research projects is provided, including the construction of a logic model, the selection of an implementation framework, and the selection of research methodologies. A detailed example of an augmentative and alternative communication research program is provided to illustrate the process.

CONCLUSIONS

Readily available online tools can help researchers start the process of integrating implementation science into clinical practice research, and existing frameworks can assist with developing and guiding research programs to ensure maximal impact. If the ultimate goal is to improve the daily lives of individuals with communication disorders through the use of evidence-based practices, clinical practice researchers must integrate these approaches into their research programs.

Teaching Parents Read, Ask, Answer, Prompt Strategies via Telepractice: Effects on Parent Strategy Use and Child Communication

PURPOSE

This study aimed to explore the feasibility of a telepractice communication partner intervention for children who use augmentative and alternative communication (AAC) and their parents.

METHOD

Five children (aged 3;4-12;9 [years;months]) with severe expressive communication impairments who use AAC and their parents enrolled in a randomized, multiple-probe design across participants. A speech-language pathologist taught parents to use a least-to-most prompting procedure, Read, Ask, Answer, Prompt (RAAP), during book reading with their children. Parent instruction was provided through telepractice during an initial 60-min workshop and five advanced practice sessions (M = 28.41 min). The primary outcome was parents' correct use of RAAP, measured by the percentage of turns parents applied the strategies correctly. Child communication turns were a secondary, exploratory outcome.

RESULTS

There was a functional relation (intervention effect) between the RAAP instruction and parents' correct use of RAAP. All parents showed a large, immediate increase in the level of RAAP use with a stable, accelerating (therapeutic) trend to criterion after the intervention was applied. Increases in child communication turns were inconsistent. One child increased his communication turns. Four children demonstrated noneffects; their intervention responses overlapped with their baseline performance.

CONCLUSIONS

Telepractice RAAP strategy instruction is a promising service delivery for communication partner training and AAC interventions. Future research should examine alternate observation and data collection and ways to limit communication partner instruction barriers.

Applying Implementation Science to Support Active Collaboration in Noninvasive Brain-Computer Interface Development and Translation for Augmentative and Alternative Communication

PURPOSE

The purpose of this article is to consider how, alongside engineering advancements, noninvasive brain-computer interface (BCI) for augmentative and alternative communication (AAC; BCI-AAC) developments can leverage implementation science to increase the clinical impact of this technology. We offer the Consolidated Framework for Implementation Research (CFIR) as a structure to help guide future BCI-AAC research. Specifically, we discuss CFIR primary domains that include intervention characteristics, the outer and inner settings, the individuals involved in the intervention, and the process of implementation, alongside pertinent subdomains including adaptability, cost, patient needs and recourses, implementation climate, other personal attributes, and the process of engaging. The authors support their view with current citations from both the AAC and BCI-AAC fields.

CONCLUSIONS

The article aimed to provide thoughtful considerations for how future research may leverage the CFIR to support meaningful BCI-AAC translation for those with severe physical impairments. We believe that, although significant barriers to BCI-AAC development still exist, incorporating implementation research may be timely for the field of BCI-AAC and help account for diversity in end users, navigate implementation obstacles, and support a smooth and efficient translation of BCI-AAC technology. Moreover, the sooner clinicians, individuals who use AAC, their support networks, and engineers collectively improve BCI-AAC outcomes and the efficiency of translation, the sooner BCI-AAC may become an everyday tool in the AAC arsenal.

A survey of school-age children with highly unintelligible speech

Prevalence studies in the AAC discipline are fundamental to establishing funding, instructional, and research priorities. These data inform policy-makers on the allocation of clinical and educational services, help prioritize AAC pre-service and in-service trainings, and support AAC research grant applications. A survey study was designed to (a) provide prevalence estimates of school-age students who have highly unintelligible speech, (b) describe the demographic makeup of these students, and (c) describe their access to AAC. Rigorous web-based survey development and distribution procedures were followed. Special education administrators in New Mexico, USA were recruited to distribute the surveys to speech-language pathologists (SLPs) in their respective school districts. The majority of school districts in the state participated, and the overall SLP response rate for participating districts was high (65%). Based on the results, the best estimate indicates that approximately 1 in 89 school-age students in New Mexico has severely unintelligible speech. SLPs averaged 5.4 students per caseload with severely unintelligible speech, with 86% of SLPs providing services to at least one of these students. Only 22% of students with highly unintelligible speech had been seen by an AAC specialist. The findings highlight the substantial number of school-age students with highly unintelligible speech and the ongoing need for high quality AAC service provision for these students.

From conversation starters in the front yard to talking to God: the sensory ethnography of communication access

Aims: The nature and quality of communication access in the home can vary considerably depending upon such things as where one lives, social affiliations, and access to technology. Using findings from an in-depth study of the meaning of home for people with severe communication impairment the study sought to investigate features of communication access.Method: Data obtained from sensory ethnographic journal entries, interview, and video field notes were collected to create a communication inventory. Specific communication themes were identified and coded for frequency and intensity and then analysed with participant home type (independent living, living with immediate family, or living in a group home).Results: Findings across the three types of dwellings suggest a relationship between home type and communication access.Conclusions: With communication being an integral element of rehabilitation, issues of communication access hold implications for both service delivery and research practice across the field of rehabilitation. The contribution of sensory ethnography and its potential use in rehabilitation was also a significant outcome of the study.Implications for rehabilitationCommunication is an important element of rehabilitation but despite the epidemiology of communication disorders among service recipient, it has not received adequate attention from across the field of rehabilitation.This study highlights how environmental factors can greatly shape communication access for many people with significant communication disability.By increasing awareness of communication access, practitioners and researchers of rehabilitation are invited to reflect upon and improve communication corridors; ultimately leading to better health outcomes.The study successfully combines it with the innovations of sensory ethnography with strong potential for development across rehabilitation.In challenging the notion of augmentative and alternative communication (AAC) as belonging to speech pathology, the study contributes to arguments for increased capacity building and interdisciplinary practice across all of rehabilitation.

Teaching Preschoolers With Down Syndrome Using Augmentative and Alternative Communication Modeling During Small Group Dialogic Reading

Purpose This study evaluated the effect of aided augmentative and alternative communication modeling (AAC-MOD) on the communication skills of children with Down syndrome (DS) during small group dialogic reading. Method Four children with DS between 3;1 and 5;3 (years;months; M = 4;5) and 5 typically developing peers between 3;5 and 5;9 (M = 4;3) participated. Effects were examined using a multiple probe across behaviors design with 4 children with DS. To simulate typical dialogic reading routines in inclusive classrooms, a strategy called Read, Ask, Answer, Prompt (Binger, Kent-Walsh, Ewing, & Taylor, 2010) was applied during the baseline and intervention sessions. Results A functional relation was demonstrated between (a) AAC-MOD and percentage of correctly identified symbols for 3 participants, (b) AAC-MOD and rate of symbolic communication for 2 participants, and (c) AAC-MOD and number of different words for 2 participants. Increases in number of multiple word combinations occurred for 2 participants. All 4 children maintained their percentage of correctly identified symbols. Increases in rate of symbolic communication did not generalize to thematic play contexts, a distal measure of response generalization. Conclusion AAC-MOD is an effective strategy for teaching target vocabulary and increasing rate of symbolic communication in young children with DS. Supplemental Material https://doi.org/10.23641/asha.10093538.

Intervention focus moderates the association between initial receptive language and language outcomes for toddlers with developmental delay

This ex-post facto study reanalyzed data from Romski et al. to examine whether intervention focus moderated the relationship between pre-intervention standardized measures of receptive language and post-intervention standardized measures of receptive and expressive language age and observations of expressive target vocabulary size. In all, 62 toddlers with developmental delay were randomly assigned to augmented communication-input (AC-I), augmented communication-output (AC-O), or spoken communication (SC) interventions. AC-I provided augmented language input via spoken language and a speech-generating device (SGD); AC-O encouraged the production of augmented output via an SGD; and SC provided spoken input and encouraged spoken output without using an SGD. Intervention focus moderated the impact of initial receptive language on expressive language age and expressive target vocabulary size. Participants in AC-I, when compared to those in the other two interventions, had a significantly stronger relationship between initial receptive language and post-intervention expressive language age. For expressive target vocabulary size, participants in AC-O showed a strong relationship and those in AC-I a slightly weaker relationship between initial receptive language and expressive target vocabulary size; no significant relationship was found in the SC group. Results emphasize that different interventions may have distinct outcomes for children with higher or lower initial receptive language.