This webinar from the FAVI DeafBlind Collaborative will show the components of the "Communication Matrix," as well as additional resources for targeting appropriate instructional strategies.
An updated (2022) version of "Dimensions of Communication: A Manual to Assess the Communication Skills and Behaviors of Individuals with Disabilities," by Nancy Sall, Ed.D. and Cathy Rikhye, Ed.D., is available through the Council for Exceptional Children.