Augmentative and alternative communication (AAC) devices are tools that help people with speech or language impairments communicate. Visual scene displays (VSDs) enhance these tools with interactive pictures and videos and appear to improve the effectiveness of communication support for children with speech-related disabilities, but the use of VSDs was not designated as an “evidence-based practice.” Augmentative and alternative communication (AAC) devices are tools that help people with speech or language impairments communicate. Visual scene displays (VSDs) enhance these tools with interactive pictures and videos and appear to improve the effectiveness of communication support for children with speech-related disabilities, but the use of VSDs was not designated as an “evidence-based practice.” Education Phys.org – latest science and technology news stories