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Justin Matejka

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Justin Matejka

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Publications by Justin Matejka (bibliography)

» 2009 «

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Matejka, Justin, Grossman, Tovi, Lo, Jessica and Fitzmaurice, George W. (2009): The design and evaluation of multi-finger mouse emulation techniques. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 1073-1082. Available online

“We explore the use of multi-finger input to emulate full mouse functionality, such as the tracking state, three buttons, and chording. We first present the design space for such techniques, which serves as a guide for the systematic investigation of possible solutions. We then perform a series of pilot studies to come up with recommendations for the various aspects of the design space. These pilot studies allow us to arrive at a recommended technique, the SDMouse. In a formal study, the SDMouse was shown to significantly improve performance in comparison to previously developed mouse emulation techniques.”

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» 2008 «

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Fitzmaurice, George W., Matejka, Justin, Khan, Azam, Glueck, Mike and Kurtenbach, Gordon (2008): PieCursor: merging pointing and command selection for rapid in-place tool switching. In: Proceedings of ACM CHI 2008 Conference on Human Factors in Computing Systems April 5-10, 2008. pp. 1361-1370. Available online

“We describe a new type of graphical user interface widget called the "PieCursor." The PieCursor is based on the Tracking Menu technique and consists of a radial cluster of command wedges, is roughly the size of a cursor, and replaces the traditional cursor. The PieCursor technique merges the normal cursor function of pointing with command selection into a single action. A controlled experiment was conducted to compare the performance of rapid command and target selection using the PieCursor against larger versions of Tracking Menus and a status quo Toolbar configuration. Results indicate that for small clusters of tools (4 and 8 command wedges) the PieCursor can outperform the toolbar by 20.8% for coarse pointing. For fine pointing, the performance of the PieCursor degrades approximately to the performance found for the Toolbar condition.”

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» 2005 «

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Khan, Azam, Matejka, Justin, Fitzmaurice, George W. and Kurtenbach, Gordon (2005): Spotlight: directing users' attention on large displays. In: Proceedings of ACM CHI 2005 Conference on Human Factors in Computing Systems 2005. pp. 791-798. Available online

“We describe a new interaction technique, called a spotlight, for directing the visual attention of an audience when viewing data or presentations on large wall-sized displays. A spotlight is simply a region of the display where the contents are displayed normally while the remainder of the display is somewhat darkened. In this paper we define the behavior of spotlights, show unique affordances of the technique, and discuss design characteristics. We also report on experiments that show the benefit of using the spotlight a large display and standard desktop configuration. Our results suggest that the spotlight is preferred over the standard cursor and outperforms it by a factor of 3.4 on a wall-sized display.”

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Yankelovich, Nicole, Wessler, Mike, Kaplan, Jonathan, Provino, Joe, Simpson, Nigel, Haberl, Karl and Matejka, Justin (2005): Office central. In: Proceedings of the Conference on Designing for User Experiences DUX05 2005. p. 52. Available online

“Using Office Central, remote workers can "advertise" their presence in public spaces within offices, such as break areas, lounges or cafeterias. The design concept is to encourage informal, unplanned interactions between remote workers and those who pass through the public spaces. In this prototype installation at the Computer History Museum in Mountain View, CA, we set up a lounge area with an Office Central picture window display (Figure 1). The local people in the lounge, wearing RFID tags for identification, could chat informally with remote people using a high-fidelity, CD-quality audio channel. The virtual meeting places included audio and video content, designed to be experienced jointly by the local and remote people. Some content was also tailored to the local people, updating as they approached the picture window display.”

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