Several examples of concrete mathematical models are discussed along with suggested criteria for good heuristic models. (MN)

This article discusses the increasing incidence of cortical visual impairments, resulting from medical advancements making possible the survival of critically ill children with severe brain damage. Discussed are the prevalence of multiple handicaps, formation of visual concepts, foreground/background distinction, potential for mainstreaming, use…

This article presents a brief overview of the literature pertaining to the use of objects of reference by people with deaf-blindness. It suggests that the establishment of nonsymbolic object use in appropriate routines may facilitate the acquisition of the symbolic use of objects. (MDM)

This paper discusses the capabilities of the Internet, including the ability to combine textual with visual presentation information, that make it an especially useful learning tool for students with hearing impairments. Instructional design recommendations are made for effective computer-assisted lessons that will help to develop and expand…

This volume contains 53 articles grouped under five headings: (1) Research (14 papers on such topics as cognitive style and cognitive strategies, visual literacy training, and the impact of diagrams, type styles, and computer graphics on learning); (2) Theory (nine papers on such topics as the development of visual literacy concepts, cognition and…