Clarifying the distinction between lexical and gestural commands

Abstract

A distinction is drawn between conventional lexical commands and gestural commands (e.g. circles, arrows, X'x, etc.). The distinction is discussed in the context of a central metaphor that likens computer use to communication between programmer and user. A number of limitations and benefits unique to gestural interfaces are described. It is suggested that gestural commands tend to be terse, common, unambiguous, iconic, and similar to the spontaneous hand gestures that accompany speech. The potential effects of these five qualities are outlined by summarizing selected research from cognitive and social psychology. Some potential applications are also described. © 1990 Academic Press Limited.