Naturalistic Speech-Generating Device Interventions for Children With Complex Communication Needs: A Systematic Review of Single-Subject Studies

Are minimally verbal autistic children's modality and form of communication associated with parent responsivity?

Prior work examined how minimally verbal (MV) children with autism used their gestural communication during social interactions. However, interactions are exchanges between social partners. Examining parent-child social interactions is critically important given the influence of parent responsivity on children's communicative development. Specifically, parent responses that are semantically contingent to the child's communication plays an important role in further shaping children's language learning. This study examines whether MV autistic children's (N = 47; 48-95 months; 10 females) modality and form of communication are associated with parent responsivity during an in-home parent-child interaction (PCI). The PCI was collected using natural language sampling methods and coded for child modality and form of communication and parent responses. Findings from Kruskal-Wallis H tests revealed that there was no significant difference in parent semantically contingent responses based on child communication modality (spoken language, gesture, gesture-speech combinations, and AAC) and form of communication (precise vs. imprecise). Findings highlight the importance of examining multiple modalities and forms of communication in MV children with autism to obtain a more comprehensive understanding of their communication abilities; and underscore the inclusion of interactionist models of communication to examine children's input on parent responses in further shaping language learning experiences.

The Social Validity of Behavioral Interventions: Seeking Input from Autistic Adults

Many in the autistic community have expressed concerns regarding the use of behavioral interventions with autistic children, suggesting that these interventions may not be socially valid. Though behavioral interventions have evolved to be more naturalistic and child-centered, little structured research has been done to explicitly seek autistic perspectives on the acceptability of specific components of behavioral interventions. Autistic adults (N = 235) were recruited online to take the Autism Intervention Attitudes Scale (AIAS), a questionnaire designed to gather feedback on common intervention goals and practices. Results indicate that participants find goals and practices that highlight quality of life, safety, and autistic interactions acceptable, while those that focus on normalization based on neurotypical standards are not. An exploratory graph analysis revealed three communities of goals ("uncontroversial goals", "controversial goals", and "social goals"). Comparison between naturalistic and structured intervention components additionally showed that autistic participants favored naturalistic strategies. These findings are in line with known criticisms of behavioral intervention from autistic adults, but also provide more information on the specific ways in which behavioral interventions can be reformed. This information can guide professionals in the development of appropriate goals and decisions around intervention planning.

Promising Strategies for Teaching Augmentative and Alternative Communication in Inclusive Educational Settings: A Systematic Review

PURPOSE

The purpose of this article was to conduct a systematic review of the literature on teaching or increasing the use of augmentative and alternative communication (AAC) by students with significant intellectual disabilities and complex communication needs (CCNs) within inclusive school settings.

METHOD

A systematic review of research literature from 1998 to 2022 was completed using multiple electronic databases, as well as citation chaining and cited author reference searches. Three hundred two articles were located with 17 meeting criteria for inclusion in this systematic review. Articles were initially screened by one author for potential inclusion; the remaining 83 were coded by one author and reviewed for consensus by three authors for inclusion in this review. Articles were analyzed and rated regarding both level of research design and quality of methodology.

RESULTS

All studies reported positive outcomes, with students with significant intellectual disabilities and CCN, of AAC intervention implemented in an inclusive setting. Fourteen over 17 studies were single-case designs with an average rating of 76% on the Single-Case Experimental Design measure of methodological quality. Less than half of the studies assessed generalization of subject learning. Review of interventions used in the studies, however, revealed the majority of studies utilized packages of interventions, making it difficult to determine the effectiveness of individual approaches.

CONCLUSIONS

This systematic review indicates there are promising interventions within inclusive settings for improved use of AAC by students with significant intellectual disabilities and CCN. Further research is needed, however, to obtain more data on generalization of student gains as well as to determine which specific interventions might be the most successful for this population of students in inclusive settings.

Exploring Classroom Factors and Augmentative and Alternative Communication Use in Qualitative Interviews

PURPOSE

This qualitative study explores classroom contextual factors influencing augmentative and alternative communication (AAC) use in early childhood classrooms.

METHOD

Semistructured interviews were conducted with six special education teachers, 13 speech-language pathologists (SLPs), and one SLP assistant. Interviews were analyzed inductively in a systematic, multistep coding process using the constant comparative method with member checking.

RESULTS

Seven themes were identified that affected AAC use in the classroom. Each theme was organized into three categories: individual-, classroom-, or school-level factors. Three themes were categorized as individual-level factors: Students' AAC systems are unavailable, professionals face challenges obtaining AAC knowledge and skills, and students' disruptive behaviors reduce access to AAC. One theme was a classroom-level factor: Classroom demands prevent AAC use. Finally, three themes were considered school-level factors: The culture of AAC influences AAC acceptance, team collaboration is essential for successful implementation, and teams need administrative support to deliver AAC interventions effectively. Conclusions: Teachers and SLPs felt that collaborative teams with AAC expertise, a school culture that endorsed AAC, and solid administrative support accelerated AAC adoption by normalizing AAC use in the classroom. Due to classroom demands, they struggled to use strategies such as aided AAC modeling and responsiveness during group instruction. Finally, participants emphasized that while it was necessary to customize AAC systems for each student, this individualization makes it harder for staff to learn each system and integrate them into classroom activities.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.23681718.

Systematic Review of Variables Related to Instruction in Augmentative and Alternative Communication Implementation: Group and Single-Case Design

PURPOSE

This article provides a systematic review and analysis of group and single-case studies addressing augmentative and alternative communication (AAC) intervention with school-aged persons having autism spectrum disorder (ASD) and/or intellectual/developmental disabilities resulting in complex communication needs (CCNs). Specifically, we examined participant characteristics in group-design studies reporting AAC intervention outcomes and how these compared to those reported in single-case experimental designs (SCEDs). In addition, we compared the status of intervention features reported in group and SCED studies with respect to instructional strategies utilized.

PARTICIPANTS

Participants included school-aged individuals with CCNs who also experienced ASD or ASD with an intellectual delay who utilized aided or unaided AAC.

METHOD

A systematic review using descriptive statistics and effect sizes was implemented.

RESULTS

Findings revealed that participant features such as race, ethnicity, and home language continue to be underreported in both SCED and group-design studies. Participants in SCED investigations more frequently used multiple communication modes when compared to participants in group studies. The status of pivotal skills such as imitation was sparsely reported in both types of studies. With respect to instructional features, group-design studies were more apt to utilize clinical rather than educational or home settings when compared with SCED studies. In addition, SCED studies were more apt to utilize instructional methods that closely adhered to instructional features more typically characterized as being associated with behavioral approaches.

CONCLUSION

The authors discuss future research needs, practice implications, and a more detailed specification of treatment intensity parameters for future research.

Comparing Interventions With Speech-Generating Devices and Other Augmentative and Alternative Communication Modes: A Meta-Analysis

PURPOSE

Optimal augmentative and alternative communication (AAC) systems for children with complex communication needs depend in part on child characteristics, child preferences, and features of the systems themselves. The purpose of this meta-analysis was to describe and synthesize single case design studies comparing young children's acquisition of communication skills with speech-generating devices (SGDs) and other AAC modes.

METHOD

A systematic search of published and gray literature was conducted. Data related to study details, rigor, participant characteristics, design information, and outcomes were coded for each study. A random effects multilevel meta-analysis was performed using log response ratios as effect sizes.

RESULTS

Nineteen single case experimental design studies with 66 participants (M age = 4.9 years) met inclusion criteria. All but one study featured requesting as the primary dependent variable. Visual analysis and meta-analysis indicated no differences between use of SGDs and picture exchange for children learning to request. Children demonstrated preferences for and learned to request more successfully with SGDs than with manual sign. Children who preferred picture exchange also learned to request more easily with picture exchange than with SGDs.

CONCLUSIONS

Young children with disabilities may be able to request equally well with SGDs and picture exchange systems in structured contexts. More research is needed comparing AAC modes with diverse participants, communication functions, linguistic complexity, and learning contexts.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.22111181.

Participant characteristics predicting communication outcomes in AAC implementation for individuals with ASD and IDD: a systematic review and meta-analysis

This meta-analysis examined communication outcomes in single-case design studies of augmentative and alternative communication (AAC) interventions and their relationship to participant characteristics. Variables addressed included chronological age, pre-intervention communication mode, productive repertoire, and pre-intervention imitation skills. Investigators identified 114 single-case design studies that implemented AAC interventions with school-aged individuals with autism spectrum disorder and/or intellectual disability. Two complementary effect size indices, Tau(AB) and the log response ratio, were applied to synthesize findings. Both indices showed positive effects on average, but also exhibited a high degree of heterogeneity. Moderator analyses detected few differences in effectiveness when comparing across diagnoses, age, the number and type of communication modes, participant's productive repertoires, and imitation skills to intervention. A PRISMA-compliant abstract is available: https://bit.ly/30BzbLv.

A Systematic Review of Augmentative and Alternative Communication Interventions for Children Aged From 0 to 6 Years

PURPOSE

This systematic review evaluates the latest available evidence regarding augmentative and alternative communication (AAC) interventions in children from 0 to 6 years old diagnosed with various disabilities.

METHOD

A systematic search was conducted in MEDLINE (OVID), PsycINFO (EBSCO), ERIC (ProQuest), SCIELO (WOS), Teacher Reference Center (EBSCO), and Education Database (ProQuest), and studies on AAC interventions in children from 0 to 6 years old diagnosed with various disabilities were selected independently by two reviewers (A.L.-R. and N.I.M.) according to the purpose of the review.

RESULTS

Twenty-nine of 1,709 studies met the inclusion criteria for this review. The methodological quality of the included studies was assessed, and the characteristics and results of the studies were extracted by a descriptive analysis (O.L.S. and M.O.-V.).

CONCLUSION

This analysis revealed that children with different diagnoses show improvements in expressive and receptive communication, functional communication behaviors, communication participation skills, interaction strategies, and symbol and multisymbol production and comprehension by using various AAC systems.

Building Family Capacity: supporting multiple family members to implement aided Language modeling

Family-centered capacity-building practices have been shown to benefit children and families. However, limited research explores these practices for children who use augmentative and alternative communication. This study explored an intervention to teach family members to implement an Aided Language Modeling (ALM) strategy across natural activities at home. A single case multiple probe design was used to evaluate the intervention with five family members and a girl with autism. Results showed the intervention increased family members’ percentage of high-fidelity ALM strategy use and rate of ALM. Descriptively, a modest increase was also observed in the proportion of the child’s communication using the speech-generating device. Social validity interviews suggested the goals, procedures, and outcomes were socially valid and supported family capacity building.

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.

A parent-implemented embedded AAC intervention for teaching navigational requests and other communicative functions to children with Autism spectrum disorder

This study evaluated the effectiveness of an embedded naturalistic intervention for teaching augmentative and alternative communication (AAC) application responses to three preschool-aged males with autism spectrum disorder (ASD). Parents were taught to embed opportunities for their child to communicate with a grid-based AAC application during every-day routines such as play or mealtime. Communication targets included requesting objects using two-step taxonomic navigational responses, and requesting assistance, rejecting items, or making social comments/responses using a two-step message-strip response. During intervention, parents used strategies such as time delay, prompting, reinforcement, and device proximity (faded over time) to encourage target responses. Display formats and intervention targets were selected in consideration of prior dynamic assessment results. Effects of intervention were evaluated using a multiple probe across participants design. For functional navigational AAC item requesting, all three participants showed an immediate increase in responding that maintained at high levels. Functional AAC responding for other communicative purposes also increased, but at a more gradual pace. All three participants showed generalized responding when new items were added to displays, and when display pages with a larger array of folders and vocabulary items were introduced. Generalization to labeling tasks was mixed.

The Effects of Telepractice to Support Family Members in Modeling a Speech-Generating Device in the Home

Purpose Family members are an integral support for children with complex communication needs (CCN). However, there is limited research exploring "whole family" intervention to support children with CCN, including evidence-based approaches such as aided language modeling and innovative delivery options such as telepractice. The purpose of this study was to explore whether the use of telepractice-based training and coaching is a valid means of delivering intervention to the whole family unit to implement aided language modeling. Method A 4-year-old child with CCN who uses a speech-generating device and her four family members participated in the study. A single-case multiple-probe design across the four dyads was used to determine the effect of the memory aid, namely, Prepare, Show, Wait, and Respond, via telepractice intervention to teach family members to provide aided language modeling with fidelity during natural routines. Results We found that telepractice-based training and coaching increased family members' high-fidelity models and rate of modeling. The target child also showed an increase in independent communication and rate of augmentative and alternative communication use. Social validity interviews indicated that the participants found the intervention to be socially valid. Conclusions Given the findings of this study, speech-language pathologists should encourage the involvement of the whole family in augmentative and alternative communication interventions. Future research should examine the impact of training and coaching all family members together in their natural environment, explore specific adaptations for participants, and investigate the effects of intervention delivered by speech-language pathologists who work directly with families and utilize family-centered practices.

Naturalistic teaching approach to develop spontaneous vocalizations and augmented communication in children with autism spectrum disorder

Naturalistic developmental behavioral interventions (NDBI) have been shown to facilitate the development of spontaneous language in individuals with speech and language impairment. Several meta-analyses have reported a small number of studies that utilized naturalistic teaching approaches combined with augmentative and alternative communication (AAC) interventions to develop requesting skills in individuals with autism spectrum disorder (ASD). Therefore, the main purpose of this study was to determine whether a natural language paradigm (NLP) and time delay is effective in expanding vocal and augmented requesting skills in three children with ASD between the ages of 4 and 6 years. A concurrent multiple baseline design across participants was used to evaluate the effectiveness of the intervention. The results of the study demonstrated that the participants were successful in emitting vocal requests when both modalities were available and NLP combined with time delay was effective in increasing spontaneous vocal requests in all participants.

Augmentative and Alternative Communication for Children with Intellectual and Developmental Disability: A Mega-Review of the Literature

Establishing evidence- and research-based practices relies upon research synthesis of individual studies in reviews and meta analyses. Further summarizing scientific evidence about a specific topic by synthesizing reviews is an area of need to determine practices that have a strong evidence base and to identify areas of methodological weakness and gaps in the literature. A mega-review of literature reviews, systematic reviews, and meta-analyses on interventions using aided augmentative and alternative communication (AAC) interventions for children with intellectual and developmental disabilities from 2000 to mid-2020 was conducted. Participant and interventionist demographics, interventions, settings, outcomes, and recommendations of each review were reported and summarized. A MeaSurement Tool to Assess systematic Reviews Revised (AMSTAR 2; Shea et al., 2017) was used to examine the methodological rigor of 84 included reviews. Over the past 20 years, published reviews have increased slightly in methodological rigor but demonstrate a number of methodological weaknesses that detract from the strength of evidence for AAC interventions with this population. Suggestions for improving the methodological rigor of literature reviews and areas for future research specific to AAC interventions are discussed.

Caregivers', teachers', and assistants' use and learning of partner strategies in communication using high-tech speech-generating devices with children with severe cerebral palsy

Communication with speech generating devices (SGDs) with children with severe physical, communicative and cognitive impairments, such as children with cerebral palsy (CP), can be difficult. Use of partner strategies facilitates the communication and instructional approaches such as feedback and role play facilitate communication partners' learning in how to use partner strategies. To describe communication partners' use and learning about partner strategies in SGD-mediated communication with children with severe CP. Questionnaires (n = 65) were sent to caregivers (n = 30), teachers (n = 17), and teaching or personal assistants (n = 18) of children with severe CP. Response rate was 80%. To ask open-ended questions was the most frequently used partner strategy and aided augmented input the least frequently used partner strategy. Most commonly, participants learned partner strategies from speech and language pathologists (SLPs) who used verbal instructions when teaching partner strategies but seldom or never feedback, role play or video examples. Communication partners' learning about partner strategies in SGD-mediated communication is inadequate and needs to be improved. SLPs, who are the main prescribers of SGDs and responsible for training and support in using them, should consider using instructional approaches when teaching communication partners about partner strategies in communication with an SGD.

Teaching Preschoolers With Autism to Use Different Speech-Generating Device Display Formats During Play: Intervention and Secondary Factors

Purpose

Children with autism spectrum disorder (ASD) and complex communication needs are increasingly taught to use tablet-based speech-generating devices (SGDs). An important issue in designing such interventions is the selection of an appropriate format for displaying vocabulary. The purpose of this study was to determine (a) whether young children with ASD can be taught to use different SGD vocabulary display formats and (b) whether there are differences across the formats on a range of secondary measures (e.g., preference and generalization).

Method

Five preschoolers with ASD (and prior experience with simpler aided augmentative and alternative communication) were taught to use grid and visual scene display SGDs during a play-based intervention. Acquisition of functional responding was assessed using a single-case experimental design. Secondary variables included error types, antecedents for communication, preference, and generalization.

Results

All participants increased their use of functional target vocabulary using both the grid and the simple visual scene display. Of the five participants, three showed similar performance with both formats, whereas two had slightly higher rates of functional responding with the grid. Individualized differences across participants and formats were apparent across secondary variables (e.g., preference, error types, generalization).

Conclusions

Both simple grid and visual scene displays may be viable options when teaching functional use of SGDs to children with ASD who have prior aided augmentative and alternative communication experience. Analyzing secondary variables beyond device acquisition (e.g., generalization, preference) may have implications for individualizing intervention.

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.

Effects of gesture-based match-to-sample instruction via virtual reality technology for Chinese students with autism spectrum disorders

Effective strategies to address academic performance are critical to students with disabilities in inclusive settings. The purpose of this study was to investigate the effectiveness of using gesture-based instruction via Leap Motion-aided virtual reality (VR) technology to teach matching skills to school-aged students with autism spectrum disorder (ASD) in China. Three participants with ASD from general education schools participated in this study. A multiple probe design across participants was used. The results indicated that all participants acquired the target match-to-sample skills and maintained the acquired skills at a high level for up to 12 weeks. Results of this study provide important implications to special education and general education teachers working with students with ASD.