This study evaluated ease of learning 5 visual symbol sets (photopictorial, rebus, Blissymbolics, orthography, and Premack-type tokens) with 4 autistic students (ages 7-13). A second article describes the development of instructional procedures for the students, noting the contribution of behavioral, cognitive developmental, and information…

The word-learning ability of 12 school-age subjects with moderate or severe mental retardation was assessed. Subjects used the System for Augmenting Language with visual-graphic symbols for communication. Ability to fast map novel symbols was found to relate to symbol achievement status. Implications for vocabulary acquisition by youth with mental…