The iterative development of a tangible pin-board to symmetrically link physical and digital documents |
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Authors: | Kher Hui Ng Boriana Koleva Steve Benford |
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Affiliation: | (1) Mixed Reality Laboratory, University of Nottingham, NG81BB Nottingham, UK |
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Abstract: | There is an asymmetry in many tangible interfaces: while physical objects can be used to manipulate digital information, the
reverse is often not possible—the digital world cannot push back. We introduce a new push-back tangible technology, a pin-board
that physically ejects paper documents. This is realized by extending the Pin&Play technology to support ‘pouts’, addressable
pin-like devices that can remove themselves from a board using muscle wire actuators. We describe how this technology has
been developed through two iterations of prototyping, application and formative study. An initial study revealed how potential
mismatches between the physical and digital characteristics of pouts caused difficulties with users predicting pop-out events
and reasoning about the state of pouts. This led us to extend pouts to reveal more of their internal state, an approach verified
through a second study. It also raises more general issues for the design of pushback tangible technologies and ubiquitous
interfaces. |
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Keywords: | Tangible user interfaces Actuation Interactive surfaces Prototyping |
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