Fuzzy command grammars for intelligent interface design

Human-computer interactions involve an input language with which users input their commands and a command language that is anticipated and recognized by the system. In general, the input language is a function of the command language, while the command language can be any language defined by the system designer. The relationship between these languages is modeled using fuzzy set theory, and a fuzzy command grammar that forms a coherent framework for intelligent human-computer interface designs is defined. To test the validity of these hypotheses, an interface was designed, using fuzzy command grammars, that is consistent, context-dependent, user-sensitive, adaptive, and responsive in interactions; and provides user and system initiated help; and that reduces unnecessary interruptions in dialogues by error correction. Experimental results indicate that a fuzzy command grammar is a viable alternative for designing such interfaces