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Pfeiffer-Leßmann, N., Pfeiffer, T. & Wachsmuth, I. (2012). An Operational Model of Joint Attention - Timing of Gaze Patterns in Interactions between Humans and a Virtual Human. In Proceedings of the 34th Annual Meeting of the Cognitive Science Society, 851-856, August. Austin, TX. |
| Abstract: Joint attention has been identified as a foundational skill in human-human interaction. If virtual humans are to engage in joint attention, they have to meet the expectations of their human interaction partner and provide interactional signals in a natural way. This requires operational models of joint attention with precise information on natural gaze timing. We substantiate our model of the joint attention process by studying human-agent interactions in immersive virtual reality and present results on the timing of referential gaze during the initiation of joint attention |
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BibTeX:
@inproceedings{Pfeiffer-Lessmann.etal:OperationalModelJoint:2012,
author = {Nadine Pfeiffer-Leßmann and Thies Pfeiffer and Ipke Wachsmuth},
title = {An Operational Model of Joint Attention - Timing of Gaze Patterns in Interactions between Humans and a Virtual Human},
booktitle = {Proceedings of the 34th Annual Meeting of the Cognitive Science Society},
year = {2012},
pages = {851--856},
url = {http://wsu.mindmodeling.org/cogsci2012/cogsci12_proceedings.pdf}
}
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Pfeiffer-Lessmann, N., Pfeiffer, T. & Wachsmuth, I. (2012). An Operational Model of Joint Attention - Timing of the Initiate-Act in Interactions with a Virtual Human. In Proceedings of the KogWis 2012. |
| Abstract: Joint attention has been identified as a foundational skill in human-human interaction. In our research, we use virtual humans to evaluate cognitive models, here, enabling them to engage in joint attention. This requires an operational model with precise information on natural gaze timing. We aim at substantiating our model of joint attention (Pfeiffer-Leßmann & Wachsmuth 2009) by studying human-agent interactions and present results on the timing of referential gaze during the initiation of joint attention. Our operational model of joint attention covers four phases: initiate-act (1), respond-act (2), feedback phase (3), and focus-state (4). It is implemented in the cognitive architecture of our virtual agent Max. For the evaluation of the model in interaction with humans, investigations on timeframes, human expectations and insights on how humans actually perceive Max’ behaviors are indispensable. In the present study we focus on phase 1. We let the participants engage in joint attention with Max in an immersive virtual reality environment, which provides a highly controlled experimental setup. The experiment had two conditions: in one the participants took the role of the initiator, in the other Max was the initiator. We found that participants accepted the same kind of gaze patterns produced by Max using our model as natural as they themselves performed when they had the initiative. Thus, under both conditions we found a mean dwell time of 1.9s for the referential gaze act, which is compatible with related findings in human-human interaction. |
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BibTeX:
@inproceedings{Pfeiffer-Lessmann.etal:OperationalModelJoint:2012b,
author = {Nadine Pfeiffer-Lessmann and Thies Pfeiffer and Ipke Wachsmuth},
title = {An Operational Model of Joint Attention - Timing of the Initiate-Act in Interactions with a Virtual Human},
booktitle = {Proceedings of the KogWis 2012},
year = {2012},
url = {http://www.cogsys.wiai.uni-bamberg.de/kogwis2012/files/prelimproc.pdf}
}
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Pfeiffer, T., Liguda, C., Wachsmuth, I. & Stein, S. (2011). Living with a Virtual Agent: Seven Years with an Embodied Conversational Agent at the Heinz Nixdorf MuseumsForum. In Proceedings of the International Conference Re-Thinking Technology in Museums 2011 - Emerging Experiences, 121 - 131. Ireland: thinkk creative & the University of Limerick. |
| Abstract: Since 2004 the virtual agent Max is living at the Heinz Nixdorf MuseumsForum – a computer science museum. He is welcoming and entertaining visitors ten hours a day, six days a week, for seven years. This article brings together the experiences made by the staff of the museum, the scientists who created and maintained the installation, the visitors and the agent himself. It provides insights about the installation’s hard- and software and presents highlights of the agent’s ontogenesis in terms of the features he has gained. A special focus is on the means Max uses to engage with visitors and the features which make him attractive. | |
BibTeX:
@inproceedings{PfeifferLigudaEtAl:LivingwithVirtual:2011,
author = {Thies Pfeiffer and Christian Liguda and Ipke Wachsmuth and Stefan Stein},
title = {Living with a Virtual Agent: Seven Years with an Embodied Conversational Agent at the Heinz Nixdorf MuseumsForum},
booktitle = {Proceedings of the International Conference Re-Thinking Technology in Museums 2011 - Emerging Experiences},
publisher = {thinkk creative & the University of Limerick},
year = {2011},
pages = {121 -- 131}
}
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Breuing, A., Pfeiffer, T. & Kopp, S. (2008). Conversational Interface Agents for the Semantic Web - a Case Study. In Proceedings of the Poster and Demonstration Session at the 7th International Semantic Web Conference (ISWC 2008), October. Karlsruhe, Germany. |
| Abstract: The Semantic Web is about to become a rich source of knowledge whose potential will be squandered if it is not accessible for everyone. Intuitive interfaces like conversational agents are needed to better disseminate this knowledge, either on request or even proactively in a context-aware manner. This paper presents work on extending an existing conversational agent, Max, with abilities to access the Semantic Web via natural language communication. | |
BibTeX:
@inproceedings{Breuing:Conversational:2008,
author = {Alexa Breuing and Thies Pfeiffer and Stefan Kopp},
title = {Conversational Interface Agents for the Semantic Web - a Case Study},
booktitle = {Proceedings of the Poster and Demonstration Session at the 7th International Semantic Web Conference (ISWC 2008)},
year = {2008},
url = {http://ftp.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-401/}
}
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Dr. Thies Pfeiffer