The authors review their work on helping physicaly handicapped persons gain spatial cognition through the interactive graphics learning environment of a computer LOGO system. The findings are said to demonstrate that the LOGO tasks are a viable part of a school curriculum for students with cerebral palsy, as shown by severely/profoundly…

Discusses several philosophies of linguistics and semiotics that debate the importance of words and their relationship to signs, language as the primary modeling system, and the historical primacy of verbal versus visual communication. Describes human communication as both language-based and nonverbal, both aspects inviting arbitrary and abstract…