| 2026 | SIGdial | Exploring Retrieval Augmented Generation Approaches for Natural Language Question Understanding. | Christoph R. Kowalski, Amelie Sophie Robrecht-Hilbig, Vincent Emmerling, Stefan Kopp |
| 2025 | IVA | Real-Time Inverse Kinematics for Generating Multi-Constrained Movements of Virtual Human Characters. | Hendric Voss, Stefan Kopp |
| 2025 | SIGdial | Investigating Co-Constructive Behavior of Large Language Models in Explanation Dialogues. | Leandra Fichtel, Maximilian Spliethver, Eyke Hllermeier, Patricia Jimenez, Nils Oliver Klowait, Stefan Kopp, Axel-Cyrille Ngonga Ngomo, Amelie Sophie Robrecht, Ingrid Scharlau, Lutz Terfloth, Anna-Lisa Vollmer, Henning Wachsmuth |
| 2024 | CogSci | Allocation of Fixational Eye Movements in Response to Uncertainty in Dynamic Environments. | Nikita Abalakin, Nils Wendel Heinrich, Annika Osterdiekhoff, Stefan Kopp, Nele Russwinkel |
| 2024 | CogSci | Revealing the Dynamics of Medical Diagnostic Reasoning as Step-by-Step Cognitive Process Trajectories. | Dominik Battefeld, Sigrid Mues, Tim Wehner, Patrick House, Christoph Kellinghaus, Jrg Wellmer, Stefan Kopp |
| 2024 | CogSci | Goal-directed Allocation of Gaze Reflects Situated Action Control in Dynamic Tasks. | Nils Wendel Heinrich, Annika Osterdiekhoff, Stefan Kopp, Nele Russwinkel |
| 2024 | CogSci | Sense of Control in Dynamic Multitasking and its Impact on Voluntary Task-Switching Behavior. | Annika Osterdiekhoff, Nils Wendel Heinrich, Nele Russwinkel, Stefan Kopp |
| 2024 | HIC | XAI for U: Explainable AI for Ubiquitous, Pervasive and Wearable Computing. | Martin Gjoreski, Teena Hassan, Mor Vered, Sebastian Houben, Stefan Kopp |
| 2024 | HRI | Are Robots' Gestures Understood? A Study on the Factors Influencing how Humans Perceive Information Present in Robot Gestures. | Lisa Michelle Bohnenkamp, Olga Abramov, Stefan Kopp |
| 2024 | ICMI | Multimodal Co-Construction of Explanations with XAI Workshop. | Hendrik Buschmeier, Teena Hassan, Stefan Kopp |
| 2024 | IVA | A Study on Integrating Representational Gestures into Automatically Generated Embodied Explanations. | Amelie Sophie Robrecht, Hendric Vo, Lisa Gottschalk, Stefan Kopp |
| 2023 | CHIRA | Multiparty Dialogic Processes of Goal and Strategy Formation in Hybrid Teams. | Andreas Wendemuth, Stefan Kopp |
| 2023 | HRI | Resolving References in Natural Language Explanation Requests about Robot Behavior in HRI. | Florian Schrder, Sonja Stange, Stefan Kopp |
| 2023 | ICAART | SNAPE: A Sequential Non-Stationary Decision Process Model for Adaptive Explanation Generation. | Amelie Sophie Robrecht, Stefan Kopp |
| 2023 | ICMI | FEIN-Z: Autoregressive Behavior Cloning for Speech-Driven Gesture Generation. | Leon Harz, Hendric Vo, Stefan Kopp |
| 2023 | ICMI | AQ-GT: a Temporally Aligned and Quantized GRU-Transformer for Co-Speech Gesture Synthesis. | Hendric Vo, Stefan Kopp |
| 2023 | IVA | Towards Real-time Co-speech Gesture Generation in Online Interaction in Social XR. | Niklas Krome, Stefan Kopp |
| 2023 | IVA | A Study on the Benefits and Drawbacks of Adaptivity in AI-generated Explanations. | Amelie Sophie Robrecht, Markus Rothgnger, Stefan Kopp |
| 2023 | IVA | Augmented Co-Speech Gesture Generation: Including Form and Meaning Features to Guide Learning-Based Gesture Synthesis. | Hendric Vo, Stefan Kopp |
| 2023 | RO-MAN | Making an Android Robot Head Talk. | Marcel Heisler, Stefan Kopp, Christian Becker-Asano |
| 2022 | KI | Formalizing Cognitive Biases in Diagnostic Reasoning. | Dominik Battefeld, Stefan Kopp |
| 2022 | RO-MAN | Differences and Biases in Mentalizing About Humans and Robots. | Sophie Husemann, Jan Pppel, Stefan Kopp |
| 2021 | CogSci | Less Egocentric Biases in Theory of Mind When Observing Agents in Unbalanced Decision Problems. | Jan Pppel, Stefan Kopp, Stacy Marsella |
| 2021 | HRI | Effects of Referring to Robot vs. User Needs in Self-Explanations of Undesirable Robot Behavior. | Sonja Stange, Stefan Kopp |
| 2021 | ICMI | Addressing Data Scarcity in Multimodal User State Recognition by Combining Semi-Supervised and Supervised Learning. | Hendric Vo, Heiko Wersing, Stefan Kopp |
| 2020 | HRI | Towards an Interaction-Centered and Dynamically Constructed Episodic Memory for Social Robots. | Teena Hassan, Stefan Kopp |
| 2020 | HRI | What a Pity, Pepper!: How Warmth in Robots' Language Impacts Reactions to Errors during a Collaborative Task. | Laura Hoffmann, Melanie Derksen, Stefan Kopp |
| 2020 | HRI | Effects of a Social Robot's Self-Explanations on How Humans Understand and Evaluate Its Behavior. | Sonja Stange, Stefan Kopp |
| 2020 | HRI | Social Cognition for HRI: Exploring the Relationship between Mindreading and Social Attunement in Human-Robot Interaction. | Agnieszka Wykowska, Jairo Prez-Osorio, Stefan Kopp |
| 2020 | iLRN | Mixed or Virtual: Does Device Type Matter in Human-ECA Interactions. | Pejman Sajjadi, Mahda M. Bagher, Jan Oliver Wallgrn, Stefan Kopp, Philipp Cimiano, Alexander Klippel |
| 2019 | CogSci | Semantic coordination of speech and gesture in young children. | Olga Abramov, Stefan Kopp, Katharina J. Rohlfing, Friederike Kern, Ulrich Mertens, Anne Nmeth |
| 2019 | CogSci | Egocentric Tendencies in Theory of Mind Reasoning: An Empirical and Computational Analysis. | Jan Pppel, Stefan Kopp |
| 2019 | HRI | Second Language Tutoring Using Social Robots: L2TOR - The Movie. | Paul Vogt, Rianne van den Berghe, Mirjam de Haas, Laura Hoffmann, Junko Kanero, Ezgi Mamus, Jean-Marc Montanier, Cansu Oran, Ora Oudgenoeg-Paz, Daniel Hernndez Garca, Fotios Papadopoulos, Thorsten Schodde, Josje Verhagen, Christopher D. Wallbridge, Bram Willemsen, Jan de Wit, Tony Belpaeme, Tilbe Gksun, Stefan Kopp, Emiel Krahmer, Aylin C. Kntay, Paul M. Leseman, Amit Kumar Pandey |
| 2019 | HRI | Second Language Tutoring Using Social Robots: A Large-Scale Study. | Paul Vogt, Rianne van den Berghe, Mirjam de Haas, Laura Hoffmann, Junko Kanero, Ezgi Mamus, Jean-Marc Montanier, Cansu Oran, Ora Oudgenoeg-Paz, Daniel Hernndez Garca, Fotios Papadopoulos, Thorsten Schodde, Josje Verhagen, Christopher D. Wallbridge, Bram Willemsen, Jan de Wit, Tony Belpaeme, Tilbe Gksun, Stefan Kopp, Emiel Krahmer, Aylin C. Kntay, Paul M. Leseman, Amit Kumar Pandey |
| 2019 | SMC | Towards cognitive systems for assisted cooperative processes of goal finding and strategy change. | Andreas Wendemuth, Stefan Kopp |
| 2018 | HRI | Adaptive Behavior Generation for Child-Robot Interaction. | Jacqueline Hemminghaus, Stefan Kopp |
| 2018 | HRI | Adaptive Robot Second Language Tutoring for Children. | Thorsten Schodde, Stefan Kopp |
| 2018 | HRI | The Effect of a Robot's Gestures and Adaptive Tutoring on Children's Acquisition of Second Language Vocabularies. | Jan de Wit, Thorsten Schodde, Bram Willemsen, Kirsten Bergmann, Mirjam de Haas, Stefan Kopp, Emiel Krahmer, Paul Vogt |
| 2018 | IVA | Accuracy of Perceiving Precisely Gazing Virtual Agents. | Sebastian Loth, Gernot Horstmann, Corinnna Osterbrink, Stefan Kopp |
| 2017 | CogSci | Self-other distinction in the motor system during social interaction: A computational model based on predictive processing. | Sebastian Kahl, Stefan Kopp |
| 2017 | HAI | The Communicative Activity of "Making Suggestions" as an Interactional Process: Towards a Dialog Model for HAI. | Christiane Opfermann, Karola Pitsch, Ramin Yaghoubzadeh, Stefan Kopp |
| 2017 | HRI | Towards Adaptive Social Behavior Generation for Assistive Robots Using Reinforcement Learning. | Jacqueline Hemminghaus, Stefan Kopp |
| 2017 | HRI | Adaptive Robot Language Tutoring Based on Bayesian Knowledge Tracing and Predictive Decision-Making. | Thorsten Schodde, Kirsten Bergmann, Stefan Kopp |
| 2017 | IVA | Get One or Create One: the Impact of Graded Involvement in a Selection Procedure for a Virtual Agent on Satisfaction and Suitability Ratings. | Charlotte Diehl, Birte Schiffhauer, Friederike Eyssel, Jascha Achenbach, Sren Klett, Mario Botsch, Stefan Kopp |
| 2017 | IVA | Pragmatic Multimodality: Effects of Nonverbal Cues of Focus and Certainty in a Virtual Human. | Farina Freigang, Sren Klett, Stefan Kopp |
| 2017 | IVA | The Intelligent Coaching Space: A Demonstration. | Iwan de Kok, Felix Hlsmann, Thomas Waltemate, Cornelia Frank, Julian Hough, Thies Pfeiffer, David Schlangen, Thomas Schack, Mario Botsch, Stefan Kopp |
| 2017 | MIG | Accurate online alignment of human motor performances. | Felix Hlsmann, Stefan Kopp, Andreas Richter, Mario Botsch |
| 2017 | SIGdial | Enabling robust and fluid spoken dialogue with cognitively impaired users. | Ramin Yaghoubzadeh, Stefan Kopp |
| 2016 | ICMI | Deictic gestures in coaching interactions. | Iwan de Kok, Julian Hough, David Schlangen, Stefan Kopp |
| 2016 | IVA | This Is What's Important - Using Speech and Gesture to Create Focus in Multimodal Utterance. | Farina Freigang, Stefan Kopp |
| 2016 | IVA | The Effect of Embodiment and Competence on Trust and Cooperation in Human-Agent Interaction. | Philipp Kulms, Stefan Kopp |
| 2016 | IVA | flexdiam - Flexible Dialogue Management for Incremental Interaction with Virtual Agents (Demo Paper). | Ramin Yaghoubzadeh, Stefan Kopp |
| 2016 | VRST | The impact of latency on perceptual judgments and motor performance in closed-loop interaction in virtual reality. | Thomas Waltemate, Irene Senna, Felix Hlsmann, Marieke Rohde, Stefan Kopp, Marc O. Ernst, Mario Botsch |
| 2015 | ASSETS | Spoken Language, Conversational Assistive Systems for People with Cognitive Impairments?: Yes, If. | Ramin Yaghoubzadeh, Stefan Kopp |
| 2015 | ICMI | A Multimodal System for Real-Time Action Instruction in Motor Skill Learning. | Iwan de Kok, Julian Hough, Felix Hlsmann, Mario Botsch, David Schlangen, Stefan Kopp |
| 2015 | Interspeech | Online Lombard adaptation in incremental speech synthesis. | Sebastian Rottschfer, Hendrik Buschmeier, Herwin van Welbergen, Stefan Kopp |
| 2015 | IVA | Modeling a Social Brain for Interactive Agents: Integrating Mirroring and Mentalizing. | Sebastian Kahl, Stefan Kopp |
| 2015 | IVA | An Interaction Game Framework for the Investigation of Human-Agent Cooperation. | Philipp Kulms, Nikita Mattar, Stefan Kopp |
| 2015 | IVA | Prototyping User Interfaces for Investigating the Role of Virtual Agents in Human-Machine Interaction - A Demonstration in the Domain of Cooperative Games. | Nikita Mattar, Herwin van Welbergen, Philipp Kulms, Stefan Kopp |
| 2015 | IVA | Real-Time Visual Prosody for Interactive Virtual Agents. | Herwin van Welbergen, Yu Ding, Kai Sattler, Catherine Pelachaud, Stefan Kopp |
| 2015 | IVA | Adaptive Grounding and Dialogue Management for Autonomous Conversational Assistants for Elderly Users. | Ramin Yaghoubzadeh, Karola Pitsch, Stefan Kopp |
| 2015 | VRST | Realizing a low-latency virtual reality environment for motor learning. | Thomas Waltemate, Felix Hlsmann, Thies Pfeiffer, Stefan Kopp, Mario Botsch |
| 2014 | AAAI | A Hybrid Grammar-Based Approach for Learning and Recognizing Natural Hand Gestures. | Amir Sadeghipour, Stefan Kopp |
| 2014 | CogSci | Learning a Motor Grammar of Iconic Gestures. | Amir Sadeghipour, Stefan Kopp |
| 2014 | EACL | Situationally Aware In-Car Information Presentation Using Incremental Speech Generation: Safer, and More Effective. | Spyros Kousidis, Casey Kennington, Timo Baumann, Hendrik Buschmeier, Stefan Kopp, David Schlangen |
| 2014 | ICMI | A Multimodal In-Car Dialogue System That Tracks The Driver's Attention. | Spyros Kousidis, Casey Kennington, Timo Baumann, Hendrik Buschmeier, Stefan Kopp, David Schlangen |
| 2014 | IVA | When to Elicit Feedback in Dialogue: Towards a Model Based on the Information Needs of Speakers. | Hendrik Buschmeier, Stefan Kopp |
| 2014 | IVA | Let's Be Serious and Have a Laugh: Can Humor Support Cooperation with a Virtual Agent? | Philipp Kulms, Stefan Kopp, Nicole C. Krmer |
| 2014 | IVA | AsapRealizer 2.0: The Next Steps in Fluent Behavior Realization for ECAs. | Herwin van Welbergen, Ramin Yaghoubzadeh, Stefan Kopp |
| 2014 | LREC | ALICO: a multimodal corpus for the study of active listening. | Hendrik Buschmeier, Zofia Malisz, Joanna Skubisz, Marcin Wlodarczak, Ipke Wachsmuth, Stefan Kopp, Petra Wagner |
| 2013 | CogSci | Embodied Approaches to Interpersonal Coordination: Infants, Adults, Robots, and Agents. | Rick Dale, Chen Yu, Yukie Nagai, Moreno I. Coco, Stefan Kopp |
| 2013 | CogSci | A spreading-activation model of the semantic coordination of speech and gesture. | Stefan Kopp, Kirsten Bergmann, Sebastian Kahl |
| 2013 | GI | A conversational virtual human as autonomous assistant for elderly and cognitively impaired users? Social acceptability and design considerations. | Marcel Kramer, Ramin Yaghoubzadeh, Stefan Kopp, Karola Pitsch |
| 2013 | HRI | Generating finely synchronized gesture and speech for humanoid robots: a closed-loop approach. | Maha Salem, Stefan Kopp, Frank Joublin |
| 2013 | ICMI | Giving interaction a hand: deep models of co-speech gesture in multimodal systems. | Stefan Kopp |
| 2013 | IVA | Modeling the Semantic Coordination of Speech and Gesture under Cognitive and Linguistic Constraints. | Kirsten Bergmann, Sebastian Kahl, Stefan Kopp |
| 2013 | IVA | Using Virtual Agents to Guide Attention in Multi-task Scenarios. | Philipp Kulms, Stefan Kopp |
| 2013 | IVA | Virtual Agents as Daily Assistants for Elderly or Cognitively Impaired People - Studies on Acceptance and Interaction Feasibility. | Ramin Yaghoubzadeh, Marcel Kramer, Karola Pitsch, Stefan Kopp |
| 2012 | AAMAS | On-the-fly behavior coordination for interactive virtual agents: a model for learning, recognizing and reproducing hand-arm gestures online. | Ulf Groekathfer, Nils-Christian Whler, Thomas Hermann, Stefan Kopp |
| 2012 | ACL | Toward a Virtual Assistant for Vulnerable Users: Designing Careful Interaction. | Ramin Yaghoubzadeh, Stefan Kopp |
| 2012 | BMVC | Gesture-based Object Recognition using Histograms of Guiding Strokes. | Amir Sadeghipour, Louis-Philippe Morency, Stefan Kopp |
| 2012 | CogSci | Gestural Alignment in Natural Dialogue. | Kirsten Bergmann, Stefan Kopp |
| 2012 | ICPRAM | Low Latency Recognition and Reproduction of Natural Gesture Trajectories. | Ulf Groekathfer, Amir Sadeghipour, Thomas Lingner, Peter Meinicke, Thomas Hermann, Stefan Kopp |
| 2012 | INLG | Referring in Installments: A Corpus Study of Spoken Object References in an Interactive Virtual Environment. | Kristina Striegnitz, Hendrik Buschmeier, Stefan Kopp |
| 2012 | IVA | A Second Chance to Make a First Impression? How Appearance and Nonverbal Behavior Affect Perceived Warmth and Competence of Virtual Agents over Time. | Kirsten Bergmann, Friederike Eyssel, Stefan Kopp |
| 2012 | IVA | Understanding How Well You Understood - Context- Sensitive Interpretation of Multimodal User Feedback. | Hendrik Buschmeier, Stefan Kopp |
| 2012 | IVA | An Incremental Multimodal Realizer for Behavior Co-Articulation and Coordination. | Herwin van Welbergen, Dennis Reidsma, Stefan Kopp |
| 2012 | SIGdial | Combining Incremental Language Generation and Incremental Speech Synthesis for Adaptive Information Presentation. | Hendrik Buschmeier, Timo Baumann, Benjamin Dosch, Stefan Kopp, David Schlangen |
| 2011 | Interspeech | 'Are You Sure You're Paying Attention?' - 'Uh-Huh' Communicating Understanding as a Marker of Attentiveness. | Hendrik Buschmeier, Zofia Malisz, Marcin Wlodarczak, Stefan Kopp, Petra Wagner |
| 2011 | IVA | Towards Conversational Agents That Attend to and Adapt to Communicative User Feedback. | Hendrik Buschmeier, Stefan Kopp |
| 2011 | IVA | Creating Familiarity through Adaptive Behavior Generation in Human-Agent Interaction. | Ramin Yaghoubzadeh, Stefan Kopp |
| 2011 | RO-MAN | A friendly gesture: Investigating the effect of multimodal robot behavior in human-robot interaction. | Maha Salem, Katharina J. Rohlfing, Stefan Kopp, Frank Joublin |
| 2011 | SIGdial | Regulating Dialogue with Gestures - Towards an Empirically Grounded Simulation with Conversational Agents. | Kirsten Bergmann, Hannes Rieser, Stefan Kopp |
| 2010 | EACL | Modelling and Evaluation of Lexical and Syntactic Alignment with a Priming-Based Microplanner. | Hendrik Buschmeier, Kirsten Bergmann, Stefan Kopp |
| 2010 | ICPR | A Calibration-Free Head Gesture Recognition System with Online Capability. | Nils-Christian Whler, Ulf Grossekathofer, Angelika Dierker, Marc Hanheide, Stefan Kopp, Thomas Hermann |
| 2010 | IROS | Generating robot gesture using a virtual agent framework. | Maha Salem, Stefan Kopp, Ipke Wachsmuth, Frank Joublin |
| 2010 | IVA | Individualized Gesturing Outperforms Average Gesturing - Evaluating Gesture Production in Virtual Humans. | Kirsten Bergmann, Stefan Kopp, Friederike Eyssel |
| 2010 | IVA | Know Your Users! Empirical Results for Tailoring an Agent's Nonverbal Behavior to Different User Groups. | Nicole C. Krmer, Laura Hoffmann, Stefan Kopp |
| 2010 | RO-MAN | Towards an integrated model of speech and gesture production for multi-modal robot behavior. | Maha Salem, Stefan Kopp, Ipke Wachsmuth, Frank Joublin |
| 2010 | SIGdial | Middleware for Incremental Processing in Conversational Agents. | David Schlangen, Timo Baumann, Hendrik Buschmeier, Okko Bu, Stefan Kopp, Gabriel Skantze, Ramin Yaghoubzadeh |
| 2009 | IVA | GNetIc - Using Bayesian Decision Networks for Iconic Gesture Generation. | Kirsten Bergmann, Stefan Kopp |
| 2009 | IVA | Media Equation Revisited: Do Users Show Polite Reactions towards an Embodied Agent? | Laura Hoffmann, Nicole C. Krmer, Anh Lam-chi, Stefan Kopp |
| 2009 | IVA | The Impact of Different Embodied Agent-Feedback on Users' Behavior. | Astrid M. von der Ptten, Christian Reipen, Antje Wiedmann, Stefan Kopp, Nicole C. Krmer |
| 2009 | IVA | A Probabilistic Model of Motor Resonance for Embodied Gesture Perception. | Amir Sadeghipour, Stefan Kopp |
| 2009 | KI | Requirements and Building Blocks for Sociable Embodied Agents. | Stefan Kopp, Kirsten Bergmann, Hendrik Buschmeier, Amir Sadeghipour |
| 2008 | IVA | The Next Step towards a Function Markup Language. | Dirk Heylen, Stefan Kopp, Stacy Marsella, Catherine Pelachaud, Hannes Hgni Vilhjlmsson |
| 2008 | IVA | Comparing Emotional vs. Envelope Feedback for ECAs. | Astrid M. von der Ptten, Christian Reipen, Antje Wiedmann, Stefan Kopp, Nicole C. Krmer |
| 2008 | IVA | Do You Know How I Feel? Evaluating Emotional Display of Primary and Secondary Emotions. | Julia Tolksdorf, Christian Becker-Asano, Stefan Kopp |
| 2008 | IVA | Intelligent Agents Living in Social Virtual Environments - Bringing Max into Second Life. | Erik Weitnauer, Nick M. Thomas, Felix Rabe, Stefan Kopp |
| 2007 | Interspeech | Synthesis of prosodic attitudinal variants in German backchannel ja. | Thorsten Stocksmeier, Stefan Kopp, Dafydd Gibbon |
| 2007 | IVA | Towards an Architecture for Aligned Speech and Gesture Production. | Stefan Kopp, Kirsten Bergmann |
| 2007 | IVA | Incremental Multimodal Feedback for Conversational Agents. | Stefan Kopp, Thorsten Stocksmeier, Dafydd Gibbon |
| 2007 | IVA | The Effects of an Embodied Conversational Agent's Nonverbal Behavior on User's Evaluation and Behavioral Mimicry. | Nicole C. Krmer, Nina Simons, Stefan Kopp |
| 2007 | IVA | The Behavior Markup Language: Recent Developments and Challenges. | Hannes Hgni Vilhjlmsson, Nathan Cantelmo, Justine Cassell, Nicolas Ech Chafai, Michael Kipp, Stefan Kopp, Maurizio Mancini, Stacy Marsella, Andrew N. Marshall, Catherine Pelachaud, Zsfia Ruttkay, Kristinn R. Thrisson, Herwin van Welbergen, Rick J. van der Werf |
| 2006 | IVA | Imitation Learning and Response Facilitation in Embodied Agents. | Stefan Kopp, Olaf Graeser |
| 2006 | IVA | Towards a Common Framework for Multimodal Generation: The Behavior Markup Language. | Stefan Kopp, Brigitte Krenn, Stacy Marsella, Andrew N. Marshall, Catherine Pelachaud, Hannes Pirker, Kristinn R. Thrisson, Hannes Hgni Vilhjlmsson |
| 2005 | IVA | A Conversational Agent as Museum Guide - Design and Evaluation of a Real-World Application. | Stefan Kopp, Lars Gesellensetter, Nicole C. Krmer, Ipke Wachsmuth |
| 2004 | ICMI | Towards integrated microplanning of language and iconic gesture for multimodal output. | Stefan Kopp, Paul Tepper, Justine Cassell |
| 2003 | IVA | FlurMax: An Interactive Virtual Agent for Entertaining Visitors in a Hallway. | Bernhard Jung, Stefan Kopp |
| 2000 | ECAI | A Knowledge-based Approach for Lifelike Gesture Animation. | Stefan Kopp, Ipke Wachsmuth |