Concurrent bimanual stylus interaction: a study of non-preferred hand mode manipulation
Edward Lank, Jaime Ruiz, and William Cowan. 2006. In Proceedings of Graphics Interface 2006 (GI '06). Canadian Information Processing Society, Toronto, Ont., Canada, Canada, 17-24.
Bimanual Interaction for Tablet Computing
Interfaces that receive the majority of input through an electronic stylus often overload the stylus via software state, creating a set of modes in the interface. Typical examples of these interfaces are found in applications designed primarily for a tablet computer or data tablet, such as Windows Journal and Microsoft OneNote. In these applications a set of software buttons at the top of the screen allows a user to change the state of the tablet interface to support actions such as inking, erasing, highlighting, and editing to create and manipulate content. Prior to my work, these state manipulation operations were shown to be error-prone and have a high temporal cost.
To address the temporal cost associated with switching software state, my collaborators and I developed an interaction technique for switching software states that is based on bimanual coordination. The technique, called concurrent bimanual mode switching, allows a user to overlap the selection of software state using their non-preferred hand while performing a gesture with the preferred hand. We demonstrated that this technique allows a user to spend less time switching software state while providing interface designers with the ability to provide more options (i.e. states) to the user than previous techniques.
Recently, I collaborated with Matei Negelescu (a master's student at University of Waterloo) to develop and evaluate a bimanual interaction technique to support mixed resolution sketching on multi-touch tablet devices, i.e. iPad and Android-based tablets. The technique, called ZoomSketch, is a bimanual interaction technique where zooming is performed by setting the target with the nondominant hand while the dominant hand establishes the direction and magnitude of the expansion. Initial evaluation comparing the technique to the traditional pinch-based interaction used on many current devices (e.g. the iPhone and iPad) demonstrated that ZoomSketch offers benefits in terms of performance and degree of control.
Method and apparatus for creating and editing node-link diagrams in pen computing systems
Eric Saund and Jaime G. Ruiz. 2011. U.S. Patent No. 8,014,607. Washington, DC: U.S. Patent and Trademark Office.
A study on the scalability of non-preferred hand mode manipulation
Jaime Ruiz and Edward Lank. 2007. In Proceedings of the 9th international conference on Multimodal interfaces (ICMI '07). ACM, New York, NY, USA, 170-177.
A model of non-preferred hand mode switching
Jaime Ruiz, Andrea Bunt, and Edward Lank. 2008. In Proceedings of Graphics Interface 2008 (GI '08). Canadian Information Processing Society, Toronto, Ont., Canada, Canada, 49-56.
Designing Studies with High Ecological Validity
Matei Negulescu, Jaime Ruiz, and Edward Lank, In CHI '10 Workshop: Designing Sketch Recognition Interfaces, 2010
Exploring usability and learnability of mode inferencing in pen/tablet interfaces
Matei Negulescu, Jaime Ruiz, and Edward Lank. 2010. In Proceedings of the Seventh Sketch-Based Interfaces and Modeling Symposium (SBIM '10). Eurographics Association, Aire-la-Ville, Switzerland, Switzerland, 87-94
ZoomPointing revisited: supporting mixed-resolution gesturing on interactive surfaces
Matei Negulescu, Jaime Ruiz, and Edward Lank. 2011. In Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces (ITS '11). ACM, New York, NY, USA, 150-153.