Review article: Designing grid displays in AAC systems to enhance accuracy and reduce latency in symbol searching

Abstract

Augmentative and Alternative Communication (AAC) systems support individuals with complex communication needs. This review article examines factors influencing the design of grid displays in AAC systems to enhance symbol searching accuracy and reduce latency. Four key areas are identified: the organization of symbols, color cues, visual crowding, and symbol location. Effective symbol organization, such as semantic-syntactic and schematic displays, can facilitate efficient communication, while color cues may improve visual attention and memory recall. Managing visual crowding and strategically placing symbols based on visual field biases and motor control abilities are also crucial. By optimizing these elements, speech-language pathologists can develop AAC displays that improve user communication outcomes. The findings provide guidelines for designing user-centered AAC systems tailored to individual cognitive, motor, and sensory needs.