Research

ReadingMate

Thu, 29 Jul 2010 17:26:55 -0400

Can you read while running on a treadmill? My student and I work on solving this issue. Go to our lab website for more information.

https://engineering.purdue.edu/HIVELab/wiki/pmwiki.php/Main/ReadingMate

Kwon, B. C. & Yi, J. S. (in press). ReadingMate: Toward Understanding How Human Eyes Work When A Jogger Is Reading While Running On A Treadmill. Proceedings of the Human Factors and Ergonomics Society 54th Annual Meeting, San Francisco, California, September 27-October 1, 2010.

Kwon, B. C. and Yi, J. S. 2009. ReadingMate: an infrared-camera-based content stabilization technique to help joggers read while running on a treadmill. In Proceedings of the 27th international Conference Extended Abstracts on Human Factors in Computing Systems (Boston, MA, USA, April 04 - 09, 2009). CHI EA '09. ACM, New York, NY, 3449-3454. DOI= http://doi.acm.org/10.1145/1520340.1520501

SimulSort

Thu, 29 Jul 2010 17:01:36 -0400

Sorting is one of the well-understood and widely-used interaction techniques. Sorting has been adopted in many software applications and supports various cognitive tasks. However, when used in analyzing multi-attribute data in a table, sorting appears to be limited. When a table is sorted by a column, it rearranges the whole table, so the insights gained through the previous sorting arrangements of another column are often difficult to retain. Thus, this study proposed an alternative interaction technique, called “SimulSort.” By sorting all of the columns simultaneously, SimulSort helps users see an overview of the data at a glance. The effectiveness of Simulsort has been shown in our empirical studies, and we are looking for applying this to other areas.

Hur, I., & Yi, J. S. (2009). SimulSort: Multivariate Data Exploration through an Enhanced Sorting Technique. In Human-Computer Interaction. Novel Interaction Methods and Techniques (pp. 684-693). Presented at the Human-Computer Interaction International. Retrieved from http://dx.doi.org/10.1007/978-3-642-02577-8_75

Visual Nursing Home Choice

Fri, 1 Aug 2008 12:15:43 -0400

An individual’s decision to place a close family member in a nursing home is both difficult and crucial. To assist consumers with such a decision, several initiatives have led to the creation of public websites designed to share quality indicators for nursing homes. However, a majority of consumers fail to fully utilize this information for various reasons, such as multidimensionality, complexity, and uncertainty of the information. Some of the difficulties may be alleviated by information visualization (InfoVis) techniques. However, several unsuccessful attempts in applying InfoVis to decision making suggest that a thorough understanding of the users’ perspectives is necessary.

Accordingly, this study developed an InfoVis tool for the decision domain of choice of a nursing home. First, a framework of overarching InfoVis and decision theories, called the “visualized decision making (VDM)” framework, has been developed by combining multiple taxonomies of visualization techniques and the theory of adaptive decision behavior. Second, a decision supporting tool using several InfoVis techniques such as the weighting slider bar and the distribution view have been designed for application within the framework, and the designed tool, called the VDM tool, was implemented using interactive Web 2.0 technologies. Third, the VDM tool was empirically tested through a web-based survey, experiment, and follow-up phone interviews.

The results of this study showed that individuals faced with the decision of selecting a nursing home under information overload could make fairly high quality decisions when they used the VDM tool. Though the effects of additional visualization techniques (weighting slider bards and the distribution view) were not evident, this study provided the theoretical framework and empirical results which may help other designers of InfoVis techniques as this work addresses several issues consumers face when choosing a nursing home that can be generalized to other decision making contexts.

Visualized Decision Making: Development and Application of Information Visualization Techniques to Improve Decision Quality of Nursing Home Choice. PhD Thesis, School of Industrial and Systems Engineering, Georgia Institute of Technology, 2008. [pdf]

You can try the current prototype in the following link:

Visual Nursing Home Choice

Information Visualization Theory

Tue, 30 Oct 2007 16:49:10 -0400

Since Information Visualization (InfoVis) is still a young field of research, we do not have sufficient theories to understand how people interact with InfoVis techniques and gain benefits (e.g., insights) from them. In order to fill some of these gaps, other colleagues and I have worked on answering some of the following questions: What kinds of interaction techniques exist? How do people gain insights? What kinds of individual differences influence the use of information visualization? What is visualization literacy, and how to measure?

Yi, J. S. (2010, April 10). Implications of Individual Differences on Evaluating Information Visualization Techniques. Workshop Position Paper presented at the BELIV 2010, Atlanta, GA, USA. Retrieved from http://www.beliv.org/papers/beliv2010/Position%20Papers/20-ind_diff2_SooYi.pdf

Yi, J. S., Kang, Y., Stasko, J. T., & Jacko, J. A. (2008). Understanding and characterizing insights: how do people gain insights using information visualization? In Proceedings of the 2008 conference on BELIV 2008 (pp. 1-6). Florence, Italy: ACM. doi:10.1145/1377966.1377971

Yi, J. S., Kang, Y. A., Stasko, J., & Jacko, J. (2007). Toward a Deeper Understanding of the Role of Interaction in Information Visualization. IEEE Transactions on Visualization and Computer Graphics, 13(6), 1224-1231. Retrieved from http://portal.acm.org/citation.cfm?id=1313046.1313151

Universal Design in Practice

Fri, 6 Jan 2006 16:55:17 -0500

In spite of quite strict law enforcement (section 508), universally accessible electronic & information technologies (E&IT) have not come to our daily lives. In this project, the UDiP research team (my colleagues and I) has been investigating why universal design products are not widely available. We hypothesized that the standards and guidelines for universal designs are not optimally designed, so that designers and procurement staff are not able to utilize these resources sufficiently.

Law, C. M., Yi, J. S., Choi, Y. S., & Jacko, J. A. (2008). A Systematic Examination of Universal Design Resources: Part 2, Analysis of the Development Process. Universal Access in the Information Society, 7(1-2), 55-77.

Law, C. M., Yi, J. S., Choi, Y. S., & Jacko, J. A. (2008). A Systematic Examination of Universal Design Resources: Part 1, Heuristic Evaluation. Universal Access in the Information Society, 7(1-2), 31-54.

Law, C. M., Yi, J. S., Choi, Y. S., & Jacko, J. A. (2007). Unresolved Problems in Accessibility and Universal Design Guidelines. Ergonomics in Design: The Quarterly of Human Factors Applications, 15(3), 7-11(5).

Law, C. M., Yi, J. S., Choi, Y. S., & Jacko, J. A. (2006) Are disability-access guidelines designed for designers? Do they need to be? Proceedings of the Australia Computer-Human Interaction annual conference (OZCHI). Sydney, Australia, November 20-24, pp. 357-360.

Choi, Y. S., Yi, J. S., Jacko, J. A., & Law, C. M. (2006) Are "Universal Design Resources" Designed for Designers? Proceedings of the 8th International Conference on Assistive Technologies, Portland, OR, October 23-25, pp. 87-94.

Law, C. M., Jacko, J. A., Yi, J. S., & Choi, Y. S. (2006) Developing new heuristics for evaluating universal design standards and guidelines. Proceedings of the Ergonomics Society Annual Conference, Cambridge, UK, April 4-6, 2006.