This volume presents important results of the Collaborative Research Center (Sonderforschungsbereich) "Situated Artificial Communicators," which was funded by grants from the German Research Foundation (Deutsche Forschungsgemeinschaft) for more than twelve years. The contributions focus on different aspects of human-human and human-machine interaction in situations which closely model everyday workplace demands. The authors are linguists, psycho- und neurolinguists, psychologists and computer scientists at Bielefeld University. They jointly tackle questions of information processing in task-oriented communication. The role of key notions such as context, integration (of multimodal information), reference, coherence, and robustness is explored in great depth. Some remarkable findings and recurrent phenomena reveal that communication is, to a large extent, a matter of joint activity. The interdisciplinary approach integrates theory, description and experimentation with simulation and evaluation.

When people communicate face to face they don't just exchange verbal information. Rather, communication encompasses the whole body. Communication partners synchronize their body sway, and mimic or imitate each other's body postures and actions. They produce a multitude of manual and facial gestures that help to illustrate what is being said, show how communication partners feel, or give away verbal cues. Moreover, face-to-face communication takes place in shared contexts where partners jointly attend and refer to the same objects, often while working on joint tasks such as carrying a table or repairing a car together.
Traditionally, communication research has neglected these parts of communication using the engineering model of signal transmission as the main theoretical metaphor. This book takes a new look at recent empirical findings in the cognitive neurosciences, showing that the traditional approach is insufficient, and presenting a new interdisciplinary perspective, the Embodied Communication perspective. The core claim of the Embodied Communication perspective is that human communication involves parallel and highly interactive couplings between communication partners. These couplings range from low-level systems for performing and understanding instrumental actions, like the mirror system, to higher-systems that interpret symbols in a cultural context. The book can also serve as a guide for engineers who construct artificial agents and robots that should be able to interact with humans.

The International Gesture Workshops (GW) are interdisciplinary events for those researching gesture-based communication across the disciplines. The focus of these events is a shared interest in understanding gestures and sign language in their many facets, and using them for advancing human-machine interaction. Since 1996, International Gesture Workshops have been held roughly every second year, with fully reviewed proceedings published by Springer. The International Gesture Workshop GW 2009 was hosted by Bielefeld University's Center for Interdisciplinary Research (ZiF - Zentrum fur interdisziplinare Forschung) during February 25-27, 2009. Like its predecessors, GW 2009 aimed to provide a platform for participants to share, discuss, and criticize recent and novel research with a multidisciplinary audience. More than 70 computer scientists, linguistics, psychologists, neuroscientists as well as dance and music scientists from 16 countries met to present and exchange their newest results under the umbrella theme "Gesture in Embodied Communication and Human-Computer Interaction. " Consistent with the steady growth of research activity in this area, a large number of high-quality submissions were received, which made GW 2009 an exciting and important event for anyone interested in gesture-related technological research relevant to human-computer interaction. In line with the practice of previous gesture workshops, presenters were invited to submit theirs papers for publication in a subsequent peer-reviewed publication of high quality. The present book is the outcome of this effort. Representing the research work from eight countries, it contains a selection of 28 thoroughly reviewed articles.

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 fur interdisziplinare 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."

This book constitutes the thoroughly refereed post-proceedings of the International Workshop on Gesture and Sign Languages in Human-Computer Interaction, GW 2001, held in London, UK, in April 2001.The 25 revised full papers and 8 short papers were carefully reviewed and selected for inclusion in the post-proceedings. The papers are organized in topical sections on gesture recognition, recognition of sign languages, nature and notations of sign languages, gesture and sign language synthesis, gestural action and interaction, and applications based on gesture control.

This book presents the thoroughly refereed post-workshop proceedings of an International Workshop on Gesture and Sign Language in Human-Computer Interaction held in Bielefeld, Germany, in 1997.
The book presents 25 revised papers together with two invited lectures. Recently, gesture and sign language have become key issues for advanced interface design in the humanization of computer interaction: AI, neural networks, pattern recognition, and agent techniques are having a significant impact on this area of research and development. The papers are organized in sections on semiotics for gesture movement, hidden Markov models, motion analysis and synthesis, multimodal interfaces, neural network methods, and applications.

This book constitutes the proceedings of the 19th Annual German Conference on Artificial Intelligence, KI-95, held in Bielefeld in September 1995.
The volume opens with full versions of four invited papers devoted to the topic "From Intelligence Models to Intelligent Systems." The main part of the book consists of 17 refereed full papers carefully relected by the program committee; these papers are organized in sections on knowledge organization and optimization, logic and reasoning, nonmonotonicity, action and change, and spatial reasoning.