Mark de Graaf

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This article investigates issues of controlling the amount of time during computer game play and potential solutions to help prevent excessive gaming. The study incorporates the realization of three different variants. Two screen based solutions and one based on a physical agent, outside the computer screen, provide notification and additionally even "(More)
In this paper we present the interactive play environment GlowSteps. GlowSteps consists of ten flexible tiles that respond with light feedback on player's actions. The play environment is developed to support both social and physical play and is designed with the intention to encourage children to create their own play and games. The tiles can be programmed(More)
Play is an unpredictable and fascinating activity. Its qualities can serve as an inspiration for design. In designing for play, we focus on play environments with players and multiple interactive objects. The current understanding of how to design these objects and interaction opportunities to create meaningful interactions and engaging user experiences is(More)
In this paper we describe a study in which we examine how children play with an interactive open-ended play installation. The idea behind open-ended play solutions is that children can create their own game goals and rules. However, what design parameters help children in being able to do this? Challenges include how to get children started with creating(More)
This paper presents a design case of an interactive zoomorphic play object for open-ended pretend play, based on De Valk's three stages of play framework. It was designed to invoke pretend play around a sleeping object. Design iterations were tested in a public play environment. 1 Introduction A sleeping being – animal, human-is intriguing for many(More)
This paper presents a new design tool for developing interactive playful environments. This design tool consists of a number of cards, which explain five perspectives or lenses on play. We describe three user evaluations that were carried out with the design tool and discuss how participants used the tool in their design activities and what they considered(More)
How can we design intelligent play environments for open-ended play that support richness in play? Rich play can be described as ongoing play that changes over time in character, form and nature. This paper elaborates on our initial insights on how rules and goals develop from interaction opportunities of the system, based on two pilot studies with an(More)