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This paper, a theoretical article, aims to revisit the augmentative and alternative communication (AAC) communication model and its transmission processes and interface as proposed by Lloyd, Quist and Windsor in 1990. More specifically, the focus of this paper is on the classifications of the SELECT (i.e. the means to select symbols) and TRANS (i.e. the means to transmit messages) components of the AAC transmission processes and interface.

The field of AAC is evolving at a rapid rate. As the field continues to evolve in terms of its clinical, social, research and theoretical underpinnings, it is incumbent upon academics and practitioners in AAC to be cognizant of terminological and theoretical changes that may be needed to keep pace with the evolution of the field.

The authors welcome feedback from academics and clinicians with the hope that a more thorough discussion will lead stakeholders to more accurate and descriptive terminology related to the means to select and transmit components of the AAC model transmission processes.

The goal of this article was to suggest that the aided versus unaided classification continue to be used to classify the means to select but a new taxonomy be adopted for the means to transmit, thereby eliminating the use of the terms high and low technology. Terminology developed to describe TRANS should be unambiguous, include both expressive and receptive communication and be clinically relevant. In the opinion of the authors, the proposed taxonomy meets all three of these criteria.

Graphic symbols, such as the Picture Communication Symbols, Makaton and Widgit, have been traditionally used in the field of augmentative and alternative communication (AAC) in order to support people with little or no functional speech. The paper aims to discuss these issues.

However, given the fact that the terminology remains contested in the existing literature as well as the multidisciplinary nature surrounding graphic symbols, in more recent years and the number of terms used in different fields, it is vital that the terminology of graphic symbols is revisited again.

In the last section of the paper, a definition of graphic symbols is proposed.

The value of this paper lies in the fact that while field of graphic symbols have been used in the AAC for more than 30 years, there is still no consensus regarding the meaning of the terminology used.

Values have long guided special education services and supports for students with extensive support needs; over the past four decades, those values have been backed by research evidence demonstrating the critical nature of values related to inclusive education, self-determination, and seeking strengths and assets. In this chapter, we investigate these values and their supporting research, documenting strengths and needs in extant research. We emphasize the need to continue to embrace and maintain these values while pursuing research that addresses research gaps while centering the priorities, perspectives, and preferences of people with extensive support needs.

When the augmentative and alternative communication (ACC) model (Lloyd et al., 1990) was proposed, these components of symbols were not considered, nor were they contemplated when superordinate (Lloyd and Fuller, 1986) and subordinate levels (Fuller et al., 1992) of AAC symbol taxonomy were developed. The purpose of this paper is to revisit the ACC model and propose a new symbol classification system called multidimensional quaternary symbol continuum (MQSC)

The field of AAC is evolving at a rapid rate in terms of its clinical, social, research and theoretical underpinnings. Advances in assessment and intervention methods, technology and social issues are all responsible to some degree for the significant changes that have occurred in the field of AAC over the last 30 years. For example, the number of aided symbol collections has increased almost exponentially over the past couple of decades. The proliferation of such a large variety of symbol collections represents a wide range of design attributes, physical attributes and linguistic characteristics for aided symbols and design attributes and linguistic characteristics for unaided symbols.

Therefore, it may be time to revisit the AAC model and more specifically, one of its transmission processes referred to as the means to represent.

The focus of this theoretical paper then, is on the current classification of symbols, issues with respect to the current classification of symbols in terms of ambiguity of terminology and the evolution of symbols, and a proposal for a new means of classifying the means to represent.

The peer review history for this article is available at: https://publons.com/publon10.1108/JET-04-2021-0024

Graphic symbols, such as photographs, Makaton and Pics for PECS, are often used in the field of augmentative and alternative communication (AAC) to support people with complex communication disorders. However, there is little research focusing on the preferences of people with disabilities in terms of which type of graphic symbol they prefer to use for their communication interactions. The purpose of this paper is to investigate the symbol preferences of people with Autism Spectrum Disorder and those with intellectual disability. The research questions are as follows: Do people prefer coloured or black and white symbols? What type(s) of symbols do they prefer to use for their communication interactions? What type(s) of symbols do they consider more appropriate for children? What type(s) of symbols do they consider more appropriate for adults?

A questionnaire with simple instructions was used to elicit the information from the participants. Through purposive sampling, 25 participants between the ages of 20 and 32 were selected. Twelve participants had been diagnosed with autism spectrum disorder, while the rest had mild or moderate intellectual disability.

Most of the participants preferred coloured symbols. Of all the six types of symbols, they preferred to use photographs and considered these as being the most appropriate symbols for adults, whereas, for them, Talking Mats is better for children.

It is vital that the voices of people with disabilities are heard and taken into account when services are to be provided.

Working memory (WM) is a key component of effective and efficient communication in typical communicators, with, potentially, even greater significance for those who benefit from augmentative communication. This study aims to explore the emergence of WM strategies in children with complex communication needs who may be reliant on aided communication strategies.

A quasi‐experimental repeated measures, multi‐factorial research design, comparing 30 children with complex communication needs (CCN) aged three to six years and 30 age‐matched typically developing peers. Picture stimuli representing verbs and adjectives in three categories: control words, long words and phonologically similar words are presented visually or silently in sequences of increasing length to establish each participant's memory span.

Articulatory rehearsal does not appear to be used as a memory strategy with verb material. With adjective material, there is limited evidence of emerging articulatory rehearsal at age six. Input modality does not influence rehearsal of either verbs or adjectives.

The study is small scale and exploratory, but there are suggestions that both groups of participants handle verb and adjective material differently to noun material.

Emerging WM skill in children with CCN needs to be considered in relation to the use of speech generating technology.

This paper contributes to understanding of the development and potential influence of WM in efficient aided communication.

Thorough assessment of communication is of utmost importance for successful working with people with learning disabilities. Indeed, recent legislation now makes it incumbent on professionals working with people with learning disabilities to address issues of communication, both their own communication to clients and that of their clients. There are clear associations between learning disabilities, emotional, behavioural and psychiatric problems, and impaired communication. The nature of the communication impairments experienced by individuals with learning disabilities is likely to be complex, with cumulative and inter‐related features associated with the general developmental delay, the phenotypical presentation in a particular syndrome, the presence of specific linguistic impairments and the indirect impact of other difficulties on communication skills. A number of parameters need to be addressed in a communication assessment in order to take account of the complexity and dynamism of the communication process. They concern not only the underlying developmental and communication impairments affecting particular areas of functioning, but also many aspects of the wider context in which the communication takes place.

This naturalistic study adapted exploratory school practice in order to support empirically‐informed decision making in the provision of augmentative and alternative communication (AAC) technologies for children with autism.

Research was conducted with three boys with autism and little speech, as part of a curricular literacy lesson. A mixed method approach, involving observational coding and staff diaries, identified how the boys used computer‐based voice output communication aids (VOCAs), also called speech generating devices (SGDs) and how the technology impacted on their communication and language. The boys were observed in initial lessons (“baseline” sessions), without the VOCA present and in sessions in which the VOCA was available (“intervention” sessions).

VOCAs were used for two main communicative purposes; naming and giving information, with aids being used primarily to support curricular, task‐related communication. Existing modes of communication continued to be used when access to the VOCA was available. In addition, all three boys showed an increase in Mean Length of Utterance (MLU) after the VOCA was introduced. The findings suggest that computer‐based VOCA technology can augment children's communicative participation in lesson activities. Specific patterns of change were also recorded in the boys' communication, suggesting individualised responses to this technology.

This paper extends the empirical base for clinical decision making by reporting the use of high tech VOCAs by school age children with autism for additional forms of communication, beyond those described elsewhere. It adds to the evidence that interventions which include access to a computer VOCA can have a positive impact on the language complexity of children with autism. It describes the potential of VOCAs to provide an enabling and inclusive technology in a classroom setting.

Research begins with a question that begs to be answered. The research question must be well articulated and specific. Once the research question is established, the methodology is chosen. Thus, it is the research question that determines the methodology. In the field of special education, many methodologies have been used to answer research questions. For example, Stoner et al. (2006c) used a single subject design to determine the effectiveness of the Picture Exchange Communication System (PECS) for adults with intellectual disabilities. Quasi-experimental methodology may be the appropriate methodology for determining the effectiveness of intervention with a group of students. The effectiveness of two math curricula for students at risk was conducted by Woodward and Brown (2006) using quasi-experimental research. If the research question centers on attitudes or opinions of a large group of individuals, then quantitative research may be used. Brown, Welsh, Haegle Hill, and Cipko (2008) reported on preservice teacher attitudes about teaching students with learning disabilities (LD). However, if one wants to broaden and enhance understanding and to fully and deeply comprehend the perspectives of individuals, then qualitative methodology would be used. For example, through the use of qualitative methodology, two studies (Bailey, Parette, Stoner, Angell, & Carroll, 2006a; Bailey, Stoner, Parette, & Angell, 2006b) described the perspectives of members of individual education plan (IEP) teams and perspectives of family members regarding augmentative and alternative communication (AAC) use in public schools. The findings of these studies (a) offered in-depth understanding of the process of obtaining AAC devices, (b) identified barriers and facilitators to AAC device use, and (c) provided strategies for effective use of AAC devices.