Martijn H. Vastenburg

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The use of context-aware technology in the home enables new ways to stimulate elderly in increasing their exercise levels, and consequently prevent age-related health issues amongst an increasing elderly population. This paper describes the design of a persuasive virtual coach that encourages seniors to walk more. In order to incorporate the user values and(More)
A field study in ten homes was conducted to understand what influences users’ acceptability of notifications in the home environment. The key finding is that perceived message urgency is the primary indicator of acceptability of notifications in the home—if people think a message is urgent, they want the message to be shown immediately, regardless of what(More)
Recent field experiments on acceptability of notifications in the home showed that people generally want to be informed of urgent messages as soon as possible, whereas non-urgent messages should not be presented at all. A possible way to improve the acceptability of a notification might be to adjust the presentation mode and the timing of notifications to(More)
Mood capturing techniques are being used in research settings (e.g., lab evaluation and experience sampling) and to facilitate mood communication in mediated interaction (e.g., instant messaging and blogging). Instruments currently available tend to be either limited in expression or overly demanding. In this paper we describe our work-in-progress on the(More)
Advances in sensor technology, embedded processing power, and modeling and reasoning software, have created the possibility for everyday products to sense the environment and pro-actively anticipate user needs. There is however a risk of creating environments in which people experience a lack of control. The aim of this study is to explore the degree in(More)
Experience sampling techniques can be used to study user experiences with products in a natural setting and over time. Nowadays, researchers can use selective sampling to link the timing and questions to relevant product events and contextual events. Existing research has focused on maximizing the quality and quantity of feedback, while at the same time(More)
Technology is now available for creating affordable sensor networks and infrastructures for ubiquitous computing environments. In the area of ambient assisted living, context-awareness is considered to be a key factor towards creating acceptable solutions that support elderly people in living independently in their homes as long as possible. Unfortunately,(More)
The complex control problem of creating home atmospheres using light, music, and projected wall-art can be reduced by focusing on desired experience, rather than product functions and features. A case study is described in which subjective interpretations of living room atmospheres were measured and embedded into a prototype display system. A(More)
Despite the wealth of information and communication technology in society today, there appears to be a lack of acceptable information services for the growing elderly population in need of care. Acceptability is not only related to human factors such as button size and legibility, but rather relates to perceived value and harmony in relation to existing(More)