The investigation compared the transparency of 11 different types of symbols with 40 nonspeaking mentally retarded subjects (ages 4-20). Analysis indicated a hierarchy of difficulty with actual objects the easiest and Blissymbols and written words the hardest to understand. Results have implications for selecting initial symbol systems for…

The investigation examined the transparency and recall of symbols representing three parts of speech (nouns, verbs, and descriptors) from three different graphic symbol systems (Blissymbols, Picture Communication System, and Picsyms) among adults with intellectual handicaps. Results suggested that Blissymbols were the least transparent and hardest…

This manual is intended to accompany a videotape entitled "Tangible Symbol Systems." The manual summarizes techniques shown in the videotape, gives additional background and technical information, and supplies recordkeeping forms. It is aimed at teachers, parents, and others who work with individuals who have severe/multiple sensory…

Symbol shelves are tools for developing two-way communication with multihandicapped children who can anticipate events, but who do not respond to speech or sign language. The purpose of symbol shelves is to allow children to be expressive through symbols, to enable them to feel some sense of control, and to serve as a bridge to a more formal…