This systematic review evaluated the effect of speech interventions with the addition of speech generating devices on vocalizations of children with autism spectrum disorder (ASD) and complex communication needs. This review synthesized information across 18 studies published in the past three decades (1990-2023) with the primary focus on the…

This comprehensive review reports on methodological quality of 162 single-case studies on augmentative and alternative communication interventions for communication and challenging behavior in individuals diagnosed with autism or intellectual disabilities and with complex communication needs. Following review for inclusion criteria, documents were…

The present study evaluated a systematic instructional package including the system of least prompts (SLP) to teach differentiation and selection of tangible symbols to continue activities for two children with complex support needs and deafblindness (DB). A multiple probe design across three symbols was used to evaluate the intervention package…

The general education classroom is filled with academic vocabulary, and individuals with developmental disabilities benefit from explicit vocabulary instruction (Browder et al., 2008; Marzano, 2020; Smith et al., 2013). Picture-based alternative and augmentative communication (AAC) can encourage academic skills development (Ahlgrim-Dehzel et al.,…

In the current investigation, we reviewed the literature on mand training for individuals with intellectual and developmental disabilities (IDD) in schools. Ninety-three studies met our inclusion criteria including 225 individual participants. Data were extracted related to participant demographics (e.g., age, disability, response form) and study…

In the present study, we aimed to make an evaluation, conduct comprehensive descriptive analyses, and calculate the effect sizes of studies which compare AAC applications designed according to single-subject research designs and conducted for individuals with ASD. Within the scope of this aim, 21 studies meeting the inclusion criteria were…

There is a lack of research on effective interventions to improve the early numeracy skills of children with severe disabilities---autism spectrum disorder, developmental disability, and intellectual disability---and complex communication needs. While preliminary research suggests the Early Numeracy curriculum is effective for teaching children…

The purpose of this study was to evaluate the effects of different speech-generating device displays and vocabulary organizations on the acquisition of multi-step requesting responses in children with autism spectrum disorder (ASD). Four young children with ASD were taught to use an iPad® application to make requests using both a taxonomically…

This study aimed to contribute to the secondary-tier evidence of the three-tier video modeling intervention model (3TVM), using a group-based generic video, and to explore a new form of augmentative and alternative communication (AAC) intervention using a Chinese-language interface for teaching children with developmental disabilities. A multiple…

Percentages of correct responses to decoding probes (i.e., phoneme identification, blending phonemes to identify words, blending phonemes to identify pictures) were measured across three participants with moderate intellectual disability or autism in elementary school. Time delay and system of least prompts were used in conjunction with an AAC…

Children and youth with autism spectrum disorders (ASD) and other developmental delays frequently experience deficits in functional communication. Identifying and using suitable communication enhancement and augmentative and alternative communication supports is essential to achievement of positive outcomes for these learners. This article…

The Picture Exchange Communication System (PECS) is an augmentative and alternative communication (AAC) program used to teach functional requesting and commenting skills to people with disabilities (Bondy & Frost, 1993; Frost & Bondy, 2002). In this study, tangible symbols were added to PECS in teaching requesting to four students (ages 7-14) with…

This study examined the acquisition and generalization of requesting behaviors learned through PECS with three children with autism. A single-subject multiple baseline across participants design was used to determine the effects of PECS. Results indicated that all three participants acquired PECS skills for requesting and generalized the skills…

A structured intervention package including direct, scaffolded, instructional lessons was implemented using an error correction learning system and a picture book-based phonological and phonemic awareness activity for four participants with complex communication needs, ranging from 12 to 15 years, in a junior high school setting. Although…

The purpose of this case study was to examine the effects of a time-delay prompting procedure on the acquisition of skills for repairing multiple listener misunderstandings. A prelinguistic student with autism was taught to use picture cards as a strategy to repair listener misunderstandings in a setting where the student had to ask the listener…