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Design and Implementation Issues for Convincing Conversational Agents

Markus Löckelt
In: Diana Perez-Marin; Ismael Pascual-Nieto (Hrsg.). Conversational Agents and Natural Language Interaction: Techniques and Effective Practices. ISBN 1-60960-617-5, IGI Global, 2011.


This chapter describes a selection of experiences from designing and implementing virtual conversational characters for multimodal dialogue systems. It uses examples from the large interactive narrative VirtualHuman and some related systems of the task-oriented variety. The idea is not to give a comprehensive overview of any one system, but rather to identify and describe some issues that might also be relevant for the designer of a new system, to show how they can be addressed, and what problems still remain unresolved for future work. Besides giving an overview of how characters for interactive narrative systems can be built in the implementation level, the focus is on what should be in the knowledge base for virtual characters, and how it should be organized to be able to provide a convincing interaction with one or multiple characters.