The following articles are from "Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference":
Yee, Ka-Ping (2003): Peephole displays: pen interaction on spatially aware handheld computers. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 1-8.
Albinsson, Par-Anders and Zhai, Shumin (2003): High precision touch screen interaction. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 105-112.
Soukoreff, R. William and MacKenzie, I. Scott (2003): Metrics for text entry research: an evaluation of MSD and KSPC, and a new unified error metric. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 113-120.
Riegelsberger, Jens, Sasse, Martina Angela and McCarthy, John D. (2003): Shiny happy people building trust?: photos on e-commerce websites and consumer trust. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 121-128.
Palen, Leysia and Dourish, Paul (2003): Unpacking "privacy" for a networked world. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 129-136.
Good, Nathaniel and Krekelberg, Aaron (2003): Usability and privacy: a study of Kazaa P2P file-sharing. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 137-144.
Bederson, Benjamin B., Lee, Bongshin, Sherman, Robert M., Herrnson, Paul S. and Niemi, Richard G. (2003): Electronic voting system usability issues. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 145-152.
Coventry, Lynne, Angeli, A. De and Johnson, Graham I. (2003): Usability and biometric verification at the ATM interface. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 153-160.
Ho-Ching, F. Wai-ling, Mankoff, Jennifer and Landay, James A. (2003): Can you see what i hear?: the design and evaluation of a peripheral sound display for the deaf. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 161-168.
Mankoff, Jennifer, Dey, Anind K., Hsieh, Gary, Kientz, Julie, Lederer, Scott and Ames, Morgan (2003): Heuristic evaluation of ambient displays. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 169-176.
Hutchinson, Hilary, Mackay, Wendy E., Westerlund, Bosse, Bederson, Benjamin B., Druin, Allison, Plaisant, Catherine, Beaudouin-Lafon, Michel, Conversy, Stephane and Eiderback, Bjorn (2003): Technology probes: inspiring design for and with families. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 17-24.
Zhai, Shumin, Conversy, Stephane, Beaudouin-Lafon, Michel and Guiard, Yves (2003): Human on-line response to target expansion. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 177-184.
Grossman, Tovi, Balakrishnan, Ravin and Singh, Karan (2003): An interface for creating and manipulating curves using a high degree-of-freedom curve input device. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 185-192.
Accot, Johnny and Zhai, Shumin (2003): Refining Fitts' law models for bivariate pointing. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 193-200.
Gutwin, Carl and Skopik, Amy (2003): Fisheyes are good for large steering tasks. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 201-208.
Tan, Desney S., Czerwinski, Mary and Robertson, George G. (2003): Women go with the (optical) flow. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 209-215.
Tan, Desney S., Gergle, Darren, Scupelli, Peter and Pausch, Randy (2003): With similar visual angles, larger displays improve spatial performance. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 217-224.
Fallman, D. (2003): Design-oriented human-computer interaction. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 225-232.
Gaver, William W., Beaver, Jacob and Benford, Steve (2003): Ambiguity as a resource for design. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 233-240.
Hook, Kristina, Sengers, Phoebe and Andersson, Gerd (2003): Sense and sensibility: evaluation and interactive art. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 241-248.
Hornof, Anthony J. and Halverson, Tim (2003): Cognitive strategies and eye movements for searching hierarchical computer displays. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 249-256.
Kurniawan, Sri, King, Alasdair, Evans, David Gareth and Blenkhorn, Paul (2003): Design and user evaluation of a joystick-operated full-screen magnifier. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 25-32.
Hudson, Scott E., Fogarty, James, Atkeson, Christopher, Avrahami, Daniel, Forlizzi, Jodi, Kiesler, Sara, Lee, Johnny and Yang, Jie (2003): Predicting human interruptibility with sensors: a Wizard of Oz feasibility study. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 257-264.
Salvucci, Dario D. and Lee, Frank J. (2003): Simple cognitive modeling in a complex cognitive architecture. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 265-272.
Friedman, Batya, Kahn, Peter H. and Hagman, Jennifer (2003): Hardware companions?: what online AIBO discussion forums reveal about the human-robotic relationship. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 273-280.
Shechtman, Nicole and Horowitz, Leonard M. (2003): Media inequality in conversation: how people behave differently when interacting with computers and people. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 281-288.
Lee, Kwan Min and Nass, Clifford (2003): Designing social presence of social actors in human computer interaction. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 289-296.
Edwards, W. Keith, Bellotti, Victoria, Dey, Anind K. and Newman, Mark W. (2003): The challenges of user-centered design and evaluation for infrastructure. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 297-304.
Wilson, Aaron, Burnett, Margaret, Beckwith, Laura, Granatir, Orion, Casburn, Ledah, Cook, Curtis, Durham, Mike and Rothermel, Gregg (2003): Harnessing curiosity to increase correctness in end-user programming. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 305-312.
Bailey, Brian P. and Konstan, Joseph A. (2003): Are informal tools better?: comparing DEMAIS, pencil and paper, and authorware for early multimedia design. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 313-320.
Luchini, Kathleen, Quintana, Chris and Soloway, Elliot (2003): Pocket PiCoMap: a case study in designing and assessing a handheld concept mapping tool for learners. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 321-328.
Kaikkonen, Anne and Roto, Virpi (2003): Navigating in a mobile XHTML application. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 329-336.
Jacko, Julie A., Scott, Ingrid U., Sainfort, Francois, Barnard, Leon, Edwards, Paula J., Emery, V. Kathlene, Kongnakorn, Thitima, Moloney, Kevin P. and Zorich, Brynley S. (2003): Older adults and visual impairment: what do exposure times and accuracy tell us about performance gains associated with multimodal feedback?. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 33-40.
Newcomb, Erica, Pashley, Toni and Stasko, John (2003): Mobile computing in the retail arena. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 337-344.
Bellotti, Victoria, Ducheneaut, Nicolas, Howard, Mark and Smith, Ian (2003): Taking email to task: the design and evaluation of a task management centered email tool. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 345-352.
Kaptelinin, Victor (2003): UMEA: translating interaction histories into project contexts. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 353-360.
Venolia, Gina Danielle and Neustaedter, Carman (2003): Understanding sequence and reply relationships within email conversations: a mixed-model visualization. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 361-368.
Furnas, George W. and Qu, Yan (2003): Using pixel rewrites for shape-rich interaction. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 369-376.
Forlizzi, Jodi, Lee, Johnny and Hudson, Scott E. (2003): The kinedit system: affective messages using dynamic texts. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 377-384.
Bargeron, David and Moscovich, Tomer (2003): Reflowing digital ink annotations. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 385-392.
Bhavnani, Suresh K., Christopher, Bichakjian K., Johnson, Timothy M., Little, Roderick J., Peck, Frederick A., Schwartz, Jennifer L. and Strecher, Victor J. (2003): Strategy hubs: next-generation domain portals with search procedures. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 393-400.
Yee, Ka-Ping, Swearingen, Kirsten, Li, Kevin and Hearst, Marti A. (2003): Faceted metadata for image search and browsing. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 401-408.
Rodden, Kerry and Wood, Kenneth R. (2003): How do people manage their digital photographs?. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 409-416.
Hwang, Faustina, Keates, Simeon, Langdon, Patrick and Clarkson, P. John (2003): Multiple haptic targets for motion-impaired computer users. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 41-48.
Kitamura, Yoshifumi, Yamaguchi, Yoshihisa, Hiroshi, Imamizu, Kishino, Fumio and Kawato, Mitsuo (2003): Things happening in the brain while humans learn to use new tools. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 417-424.
Aoki, Paul M., Romaine, Matthew, Szymanski, Margaret H., Thornton, James D., Wilson, Daniel and Woodruff, Allison (2003): The mad hatter's cocktail party: a social mobile audio space supporting multiple simultaneous conversations. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 425-432.
Berg, Sara, Taylor, Alex S. and Harper, Richard H. R. (2003): Mobile phones for the next generation: device designs for teenagers. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 433-440.
Grinter, Rebecca E. and Eldridge, Margery (2003): Wan2tlk?: everyday text messaging. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 441-448.
Fails, Jerry and Olsen, Dan R. (2003): A design tool for camera-based interaction. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 449-456.
Rui, Yong, Gupta, Anoop and Grudin, Jonathan (2003): Videography for telepresentations. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 457-464.
Chen, Milton (2003): A low-latency lip-synchronized videoconferencing system. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 465-471.
Brewster, Stephen, Lumsden, Joanna, Bell, Marek, Hall, Malcolm and Tasker, Stuart (2003): Multimodal 'eyes-free' interaction techniques for wearable devices. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 473-480.
Baudisch, Patrick and Rosenholtz, Ruth (2003): Halo: a technique for visualizing off-screen objects. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 481-488.
Beier, Betsy and Vaughan, Misha W. (2003): The bull's-eye: a framework for web application user interface design guidelines. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 489-496.
Huang, Elaine M. and Mynatt, Elizabeth D. (2003): Semi-public displays for small, co-located groups. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 49-56.
Blackmon, Marilyn Hughes, Kitajima, Muneo and Polson, Peter G. (2003): Repairing usability problems identified by the cognitive walkthrough for the web. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 497-504.
Chi, Ed H., Rosien, Adam, Supattanasiri, Gesara, Williams, Amanda, Royer, Christiaan, Chow, Celia, Robles, Erica, Dalal, Brinda and Chen, Julie (2003): The bloodhound project: automating discovery of web usability issues using the InfoScentp simulator. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 505-512.
Fussell, Susan R., Setlock, Leslie D. and Kraut, Robert E. (2003): Effects of head-mounted and scene-oriented video systems on remote collaboration on physical tasks. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 513-520.
Vertegaal, Roel, Weevers, Ivo, Sohn, Changuk and Cheung, Chris (2003): GAZE-2: conveying eye contact in group video conferencing using eye-controlled camera direction. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 521-528.
Garau, Maia, Slater, Mel, Vinayagamoorthy, Vinoba, Brogni, Andrea, Steed, Anthony and Sasse, Martina Angela (2003): The impact of avatar realism and eye gaze control on perceived quality of communication in a shared immersive virtual environment. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 529-536.
Ballagas, Rafael, Ringel, Meredith, Stone, Maureen C. and Borchers, Jan O. (2003): iStuff: a physical user interface toolkit for ubiquitous computing environments. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 537-544.
Wilson, Andrew and Shafer, Steven (2003): XWand: UI for intelligent spaces. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 545-552.
Everitt, Katherine M., Klemmer, Scott R., Lee, Robert and Landay, James A. (2003): Two worlds apart: bridging the gap between physical and virtual media for distributed design collaboration. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 553-560.
Mueller, Florian, Agamanolis, Stefan and Picard, Rosalind W. (2003): Exertion interfaces: sports over a distance for social bonding and fun. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 561-568.
Flintham, Martin, Benford, Steve, Anastasi, Rob, Hemmings, Terry, Crabtree, Andy, Greenhalgh, Chris, Tandavanitj, Nick, Adams, Matt and Row-Farr, Ju (2003): Where on-line meets on the streets: experiences with mobile mixed reality games. In: Cockton, Gilbert and Korhonen, Panu (eds.) Proceedings of the ACM CHI 2003 Human Factors in Computing Systems Conference April 5-10, 2003, Ft. Lauderdale, Florida, USA. pp. 569-576.