Coherent gestures, locomotion, and speech in life-like pedagogical agents
IUI '98 Proceedings of the 3rd international conference on Intelligent user interfaces
MULTIMEDIA '00 Proceedings of the eighth ACM international conference on Multimedia
Deictic and emotive communication in animated pedagogical agents
Embodied conversational agents
Using handhelds and PCs together
Communications of the ACM
The museum visit: generating seamless personalized presentations on multiple devices
Proceedings of the 9th international conference on Intelligent user interfaces
Integrating intra and extra gestures into a mobile and multimodal shopping assistant
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Adaptive, intelligent presentation of information for the museum visitor in PEACH
User Modeling and User-Adapted Interaction
Layered evaluation of interactive adaptive systems: framework and formative methods
User Modeling and User-Adapted Interaction
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Presentations on public information systems, like a large screen in a museum, usually cannot support heterogeneous user groups appropriately, since they offer just a single channel of information. In order to support these groups with mixed interests, a more complex presentation method needs to be used. The method proposed in this paper combines a large stationary presentation system with several Personal Digital Assistants (PDAs), one for each user. The basic idea is to ”overwrite” presentation parts on the large screen, which are of little interest to a particular user, with a personalized presentation on the PDA. We performed an empirical study with adult participants to examine the overall performance of such a system (i.e. How well is the information delivered to the users and how high is the impact of the cognitive load?). The results show, that after an initial phase of getting used to the new presentation method, subjects' performance during parallel presentations was on par with performance during standard presentations. A crucial moment within these presentations is whenever the user needs to switch his attentional focus from one device to another. We compared two different methods to warn the user of an upcoming device switch (a virtual character ”jumping” from one device to another and an animated symbol) with a version, where we did not warn the users at all. Objective measures did not favour either method. However, subjective measures show a clear preference for the character version.