Metrics for comparing three word-based software programs used for augmentative and alternative communication

The purpose of this investigation was to conduct an analysis of a set of metrics developed for comparing features of software used in speech generating devices (SGD) for augmentative and alternative communication (AAC). These metrics -measures of speed, efficiency, and accuracy -were employed during a sentence reconstruction task. Twenty two participants without disabilities reconstructed nine sentences using each of three SGD software programs, counterbalanced to remove order effects. Results revealed differences in the metrics across the software programs that were supported by a social validation survey completed by the participants. These results provide benchmark data about relative speed, accuracy, and efficiency of these software programs in structured use, and can inform professionals in matching potential AAC users with specific features of word-based software.