This paper develops a theoretical context for the concept that visual literacy involves a specific type of information processing that has been discussed in the literature on symbolism and epistemology for a number of years. Literacy is discussed first, as a general process of information processing involving the generation of knowledge through…

Three of four severely retarded adolescents and young adults learned to use computer-based lexigrams to request foods and, subsequently, objects. Additional request experience with lexigrams resulted in consistent improvement on labeling and comprehension tasks, emergence of subject-initiated lexigram communications, and facilitation of spoken…