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Hand-held devices are a pragmatic approach for direct control of large displays by means of gestures. We evaluated the performance and intuitiveness of these devices in a consistent and reliable way. An evaluation that is based on task difficulty, completion times and error rates is defined in ISO 9241-9 [1]. The contribution of this paper is an ISO 9241-9(More)
Input from the lower body in human-computer interfaces can be beneficial , enjoyable and even entertaining when users are expected to perform tasks simultaneously. Users can navigate a virtual (game) world or even an (empirical) dataset while having their hands free to issue commands. We compared the Wii Balance Board to a hand-held Wiimote for navigating a(More)
The hands are highly suited to interact with large public displays. It is, however, not apparent which gestures come naturally for easy and robust use of the interface. We first explored how uninstructed users gesture when asked to perform basic tasks. Our subjects gestured with great similarity and readily produced gestures they had seen before; not(More)
techniques with the ability of the human visual-brain system and the haptic-motoric system to explore and analyze complex data comprehensively. This kind of visualization merges several aspects of different research areas, such as In-symbolic information sources, in order to help users understand and analyze such data. For most practical applications,(More)
FeelSound is a multi-user application for collaboratively composing music in an entertaining way. Up to four composers can jointly create acoustic music on a top-projection multi-touch sensitive table. The notes of an acoustic instrument are represented on a harmonic table and, by drawing shapes on an instrument's table, a sample is created. These samples(More)
FeelSound is a multi-user, multi-touch application that aims to collaboratively compose, in an entertaining way, acoustic music. Simultaneous input by each of up to four users enables collaborative composing. This process as well as the resulting music are entertaining. Sensor-packed intelligent environments form the target location of FeelSound, varying(More)