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Easy vs. Tricky: The Shape Effect in Tracing, Selecting, and Steering With Mouse, Stylus, and Touch
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Human-Computer Interaction.
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Human-Computer Interaction.
York University, Toronto, Canada.
2013 (English)In: Academic MindTrek '13: Proceedings of International Conference on Making Sense of Converging Media / [ed] Artur Lugmayr, New York, NY, USA: Association for Computing Machinery (ACM), 2013, 99-103 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper is a work-in-progress report on an experimental comparison and evaluation of users' performance in four line-tracing tasks based on two shapes and performed with three input methods (mouse, stylus, and touch-input). The shapes' properties used in the study created the two classes of shapes: easy and hard to replicate. As expected these two classes had different impact on user's performance in each task tested (tracing, lasso selection, steering through narrow and wide tunnel). The results show that participants replicating the shapes using touch-input were the least accurate but were the fastest in comparison to the remaining input methods. The stylus was the least error-prone method and the mouse was the slowest device in drawing tasks (tracing and selection). The differences in error distances between the input methods were less pronounced in steering tasks but timing data showed that mouse was still the slowest one. While the time of replication did not differ between the two shapes tested, the differences between the errors participants made were significant for all tasks and input devices, and patterns of these differences were consistent between the shapes. These results confirm predictions from a previous study and show which shapes' properties can make their replication more difficult. The results can be used to design shapes that are easy to replicate, e.g., in surface-based gestural interaction.

Place, publisher, year, edition, pages
New York, NY, USA: Association for Computing Machinery (ACM), 2013. 99-103 p.
Keyword [en]
Mouse, stylus, pen, touch, shape, tracing, drawing, steering
National Category
Human Computer Interaction
Research subject
Human-Computer Interaction
Identifiers
URN: urn:nbn:se:uu:diva-212409DOI: 10.1145/2523429.2523444ISBN: 978-1-4503-1992-8 (print)OAI: oai:DiVA.org:uu-212409DiVA: diva2:677722
Conference
the 17th International Academic MindTrek Conference, Tampere, Finland; October 01 - 04, 2013.
Available from: 2013-12-10 Created: 2013-12-10 Last updated: 2014-04-23Bibliographically approved
In thesis
1. Creating Digital Traces of Ideas: Evaluation of Computer Input Methods in Creative and Non-Creative Drawing
Open this publication in new window or tab >>Creating Digital Traces of Ideas: Evaluation of Computer Input Methods in Creative and Non-Creative Drawing
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Ideas are formed in a process of idea generation that includes creation, development, and communication of new ideas. Drawing has been used as a support for ideation for centuries. Today, computerized tools are commonly used for drawing. Such tools form a user interface between the human and the resulting drawing presented on the screen. The interface may come between the user and the drawing in a disruptive way also affecting the ideation process.

Using controlled laboratory studies, this thesis investigates the consequences of drawing with different user interfaces in two types of tasks: creative drawing tasks (based on a standardized test of creativity) and non-creative drawing tasks (i.e. shape-tracing tasks where no new idea is created). The goal was to identify and evaluate the consequences of the several issues originating from the use of different input devices, the functionality of the graphical user interfaces, the formulation of the drawing task, and the user’s previous experience.

The results showed that drawing tasks are oriented toward quality of outcomes and that higher input accuracy led to higher quality of outcomes of both creative and non-creative drawing tasks. This came with a trade-off between the quantity and quality. In ideation, less accurate input devices facilitated significantly more ideas but these were of lower quality. In non-creative tracing, higher speeds caused lower quality of outcomes.

The users subjectively preferred higher accuracy, also when an inaccurate user interface offered an eraser function. However, using the eraser allowed avoiding reinterpretations of ideas and led to ideation strategies characterized by laborious drawing that negatively affected the quality and quantity of the ideas produced. For non-creative drawing, the more difficult the shapes were, the lower the tracing accuracy.

In the thesis a new framework for interaction analysis is introduced that improves the theoretical and practical understanding of computerized drawing tasks and the phenomena resulting from different aspects of the user interface design of computerized drawing tools.

This thesis demonstrates that the inaccuracy of computerized tools cannot only make our drawings less aesthetically pleasing but also negatively affect ideas that are created in the process.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2014. 110 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Social Sciences, ISSN 1652-9030 ; 94
Keyword
evaluation, user performance, input methods, mouse, stylus, touch, tracing, ideation
National Category
Human Computer Interaction
Research subject
Human-Computer Interaction
Identifiers
urn:nbn:se:uu:diva-220882 (URN)978-91-554-8911-3 (ISBN)
Public defence
2014-05-15, Hörsal 2, Ekonomikum, Uppsala, 13:15 (English)
Opponent
Supervisors
Available from: 2014-04-23 Created: 2014-03-22 Last updated: 2014-09-09Bibliographically approved

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