Interaction techniques that use the layers above the display surface to extend the functionality
of pen-based digitized surfaces continue to emerge. In such techniques, stylus movements are
constrained by the bounds of a layer inside which the interaction is active, as well as constraints
on the direction of movement within the layer. The problem addressed in this thesis is that
designers currently have no model to predict movement time (MT) or quantify the difficulty, for
movement (steering) in layers above the display surface constrained by thickness of the layer, its
height above the display, and the width and length of the path. The problem has two main parts:
first, how to model steering in layers, and second, how to visualize the layers to provide
feedback for the steering task. The solution described is a model that predicts movement time
and that quantifies the difficulty of steering through constrained and unconstrained paths in
layers above the display surface. Through a series of experiments we validated the derivation and applicability of the proposed models. A predictive model is necessary because the model serves as the basis for design of interaction techniques in the design space; and predictive models can be used for quantitative evaluation of interaction techniques. The predictive models are important as they allow researchers to evaluate potential solutions independent of experimental conditions.<p>Addressing the second part of the problem, we describe four visualization designs using cursors. <p>We evaluated the effectiveness of the visualization by conducting a controlled experiment.
| Identifer | oai:union.ndltd.org:USASK/oai:usask.ca:etd-07272008-163725 |
| Date | 26 August 2008 |
| Creators | Kattinakere, Raghavendra Seetharamaiah |
| Contributors | Subramanian, Sriram, Mcquillan, Ian, Mandryk, Regan, Gutwin, Carl, Bickis, Mikelis G. |
| Publisher | University of Saskatchewan |
| Source Sets | University of Saskatchewan Library |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://library.usask.ca/theses/available/etd-07272008-163725/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Saskatchewan or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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