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)
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)
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)
With today's technology, elderly users could be supported in living independently in their own homes for a prolonged period of time. Commercially available products enable remote monitoring of the state of the user, enhance social networks, and even support elderly citizens in their everyday routines. Whereas technology seems to be in place to support(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)
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)
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)
Awareness systems are a novel class of communication systems that enable people to be conscious of each other in a peripheral way. To better understand how people experience these systems over time, and how they blend in the user context, longitudinal field studies are needed. Although tangible awareness systems are considered to be more intimate and(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)