Context Tags - Exploiting User-given Contextual Cues for Disambiguation
Matthias Böhmer; Gernot Bauer; Antonio Krüger
In: Proceedings of the 13th International Conference on Human-Computer Interaction with Mobile Devices and Services. International Conference on Human-Computer Interaction with Mobile Devices and Services (MobileHCI-11), The 13th International Conference. International Conference on Human-Computer Interaction with Mobile Devices and Services (MobileHCI-11), 13th, August 30 - September 2, Stockholm, Sweden, ACM, 8/2011.
Most context-aware systems rely on physical sensors. To some extent, these systems are able to reason about a users situation by means of the measured data. However, their overall uncertainty in modeling human behavior leads to ambiguity. A language for the mediation of context information between the user and the system is required to enable the user to adjust the machines interpretation of his context. We describe how keywords that are attributed to activities by users themselves can act as such a mediator. We present results of a study that investigates the nature of this context attributes. The results demonstrate that different users use similar keywords to describe similar situations and different keywords to describe different situations. Therefore, algorithms developed to evaluate the semantic relatedness of tags and resources within folksonomies can be applied to exploit knowledge about the users contexts from the keywords they have assigned. We discuss a prototype that recommends mobile services by enhancing its model with the described keywords.