Karen Parker

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This paper presents a novel interaction technique for tabletop computer displays. When using a direct input device such as a stylus, reaching objects on the far side of a table is difficult. While remote pointing has been investigated for large wall displays, there has been no similar research into reaching distant objects on table-top displays. Augmenting(More)
This paper presents a comparison of several selection aids to improve pointing input on tabletop displays. Our previous research explored the Trac-torBeam–a hybrid point-touch interaction technique for tabletop displays. We found that while pointing input was preferred (over touch) by users of tabletop displays, it was slower for small distant targets.(More)
An essential aspect of mobile and ubiquitous computing research is evaluation within the expected usage context, including environment. When that environment is an urban center, it can be dynamic, expansive, and unpredictable. Methodologies that focus on genuine use in the environment can uncover valuable insights, although they may also limit measurement(More)
We describe the design process taken and prototype developed for a system supporting audience voting at the Summer Olympics. In our examination of issues related to the expression and capture of audience votes, we utilized informal focus groups, interviews with experts, and user studies comparing voting formats. Our proposed solution involves displaying(More)
Participant attrition (withdrawal or loss after entering a study) is a major threat to the completion of valid studies. It can result in systematic error (selection bias), thus decreasing the statistical power of studies and limiting the generalisability of study findings. This paper demonstrates how key social exchange theory principles form the(More)
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