ABSTRACT
This chapter explores theoretical concepts of interaction design in order to apply them to interactive narrative contexts. Iterations of design and testing are needed to perfect the narrative flow. This is especially true when the interactive narrative concept includes experimental interaction styles for which people cannot rely on traditional interface rule sets. As with all interactive systems, storyworlds will need to be evaluated for several target usability goals. By means of practical experiments involving several different story engines, the chapter identifies general design principles independent of a specific technical approach. Interaction design and similar tasks, such as interface design or user interface engineering, are professional disciplines. Experts create the shapes and behaviour of human-computer interfaces to make interactive digital products usable, which can mean more accessible, efficient and/or safe, as well as enjoyable or at least less frustrating. The chapter divides the tasks of dialogue design into four levels namely conceptual level, semantic level, syntactic level, and lexical level.
