Embodied agents play an increasingly important role in cognitive
interaction technology. The two main types of embodied agents are
virtual humans inhabiting simulated environments and humanoid robots
inhabiting the real world. So far research on embodied communicative
agents has mainly explored their potential for practical applications.
However, the design of communicative artificial agents can also be of
great heuristic value for the scientific study of communication. It
allows researchers to isolate, implement, and test essential properties
of inter-agent communications in operational models. Modeling
communication with robots and virtual humans thus involves the vision of
using communicative machines as research tools. Artificial systems that
reproduce certain aspects of natural, multimodal communication help to
elucidate the internal mechanisms that give rise to different aspects of
communication. In short, constructing embodied agents who are able to
communicate may help us to understand the principles of human
communication. As a comprehensive theme, "Embodied Communication in
Humans and Machines" was taken up by an international research group
hosted by Bielefeld University's Center for Interdisciplinary Research
(ZiF - Zentrum für interdisziplinäre Forschung) from October 2005
through September 2006. The overarching goal of this research year was
to develop an integrated perspective of embodiment in communication,
establishing bridges between lower-level, sensorimotor functions and a
range of higher-level, communicative functions involving language and
bodily action. The present volume grew out of a workshop that took place
during April 5-8, 2006 at the ZiF as a part of the research year on
embodied communication.