We conducted a meta-analysis to determine the impact of using tablet-based devices on the communication skills of individuals with autism and developmental disabilities. A total of 15 studies were reviewed to determine the effectiveness of the intervention on communication skills. The results showed that tablet-based devices, especially iOS devices (i.e., iPad and iPod Touch) were highly effective in increasing the communication skills of individuals with autism and developmental disabilities. Also, the results provided evidence that several participants were able to continue communicating using the devices and to use them in novel contexts. Furthermore, caregivers have positive perceptions of using iOS-based speech-generating devices for communication skills. Results are discussed and implications for practice and future research are provided.

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The purpose of this scoping review was to (a) map the research evidence on the effectiveness of augmentative and alternative communication (AAC) interventions using speech output technologies (e.g., speech-generating devices, mobile technologies with AAC-specific applications, talking word processors) for individuals with autism spectrum disorders, (b) identify gaps in the existing literature, and (c) posit directions for future research. Outcomes related to speech, language, and communication were considered. A total of 48 studies (47 single case experimental designs and 1 randomized control trial) involving 187 individuals were included. Results were reviewed in terms of three study groupings: (a) studies that evaluated the effectiveness of treatment packages involving speech output, (b) studies comparing one treatment package with speech output to other AAC modalities, and (c) studies comparing the presence with the absence of speech output. The state of the evidence base is discussed and several directions for future research are posited.