Recommender systems help people to find information that is interesting to them. However, current recommendation techniques only address the user's short-term and long-term interests, not their immediate interests. This paper describes a method to structure information (with or without using...

Predicting the interests of a user in information is an important process in personalized information systems. In this paper, we present a way to create prediction engines that allow prediction techniques to be easily combined into prediction strategies. Prediction strategies choose one or a...

We study videoconferencing for meetings with some co-located participants and one remote participant. A standard Skype-like interface for the remote participant is compared to a more immersive 3D interface that conveys gaze directions in a natural way. Experimental results show the 3D interface...

The phenomenon of immersing oneself into virtual environments has been established widely. Yet to date (to our best knowledge) the physical dimension has been neglected in studies investigating immersion in Human-Computer Interaction (HCI). In movement-based interaction the user controls the...

Movement-based and exertion interfaces assume that their users move. Users have to perform exercises, they have to dance, they have to golf or football, or they want to train particular bodily skills. Many examples of those interfaces exist, sometimes asking for subtle interaction between user...

Behavioral analysis has proven to be an important method to study human-robot interaction in real-life environments providing highly relevant insights for developing new theoretical and practical models of appropriate social robot design. In this paper we describe our approach to study...

In this paper we present the evaluation results of an exploratory study performed in an open environment with the robot receptionist Olivia. The main focus of the study was to analyze relationships between the robot's social skills and the perceived overall interaction quality, as well as to...

In this paper we present the results of a pilot study investigating the effects of agents' gender-ambiguous vs. gendermarked look on the perceived interaction quality of a multimodal question answering system. Eight test subjects interacted with three system agents, each having a feminine,...

Video game consoles that enable gamers to use active body movements are becoming increasingly popular. Yet, little is known about the influence of movement on how gamers experience such games. This study takes an exploratory approach, using different data collection methods. A theory about the...

Video game consoles that employ physical activity as an interaction mode can benefit from using the gamer's movement as feedback and adapt to it. But to be able to design such systems we need to know how gamers actually move and what we can infer from this. This paper reports preliminary,...