Ian Li

Jodi Forlizzi

Anind K. Dey


We live in a world where many kinds of data about us can be collected and more will be collected as Ubicomp technologies mature. People reflect on this data using different tools for personal informatics. However, current tools do not have sufficient understanding of users’ self-reflection needs to appropriately leverage Ubicomp technologies. To design tools that effectively assist self-reflection, we need to comprehensively understand what kinds of questions people have about their data, why they ask these questions, how they answer them with current tools, and what kinds of problems they encounter. To explore this, we conducted interviews with people who use various kinds of tools for personal informatics. We found six kinds of questions that people asked about their data. We also found that certain kinds of questions are more important at certain times, which we call phases. We identified two phases of reflection: Discovery and Maintenance. We discuss the kinds of questions and the phases in detail and identify features that should be supported in personal informatics tools for which Ubicomp technologies can play an important role.




  1. Abowd, G.D. & Mynatt, E.D. Charting Past, Present, and Future Research in Ubiquitous Computing. TOCHI, 2000, pp. 29–58.
  2. Andrews, D. The IRG Solution – Hierarchical Incompetence and How to Overcome It. Souvenir Press: London, 1984.
  3. Brophy-Warren, J. “The New Examined Life.” Wall Street Journal, 6 Dec 2008.
  4. Card, S.K., Mackinlay, J.D., & Shneiderman, B. Readings in information visualization: using vision to think. Morgan Kaufman: 1999.
  5. Carver, C. & Scheier, M.F. On the self-regulation of behavior. Cambridge University Press, 2001.
  6. Consolvo, S., McDonald, D.W., & Landay, J. Theory-Driven Design Strategies for Technologies that Support Behavior Change in Everyday Life. CHI’09, pp. 405–414.
  7. DiClemente, C.C., Marinilli, A.S., Singh, B., & Bellino, E. The Role of Feedback in the Process of Health Behavior Change. American Journal of Health Behavior, 25(3), 2000, pp. 217–227.
  8. Endsley, M.R. The Role of Situation Awareness in Naturalistic Decision Making. Naturalistic Decision Making, 1997, pp. 269–282.
  9. Freeman, E. & Gelernter, D. Lifestreams: A Storage Model for Personal Data. SIGMOD Record, 25(1), 1996, pp. 80–86.
  10. Froehlich, J., Dillahunt, T., Klasnja, P., Mankoff, J., Consolvo, S., Harrison, B., & Landay, J.A. Ubigreen: Investigating a Mobile Tool for Tracking and Supporting Green Transportation Habits. CHI’09, pp. 1043–1052.
  11. Frost, J. and Smith, B.K. Visualizing Health: imagery in diabetes education. DUX’03, pp. 1–14.
  12. Gemmell, J., Bell, G., and Lueder, R. MyLifeBits: a personal database for everything. Communications of the ACM, 2006, pp. 88–95.
  13. He, A.H., Greenberg, S., & Huang, E.M. One Size Does Not Fit All: Applying the Transtheoretical Model to Energy Feedback Technology Design. CHI’10, pp. 927–936.
  14. Hodges, S., Williams, L., Berry, E., et al. SenseCam: A Retrospective Memory Aid. Ubicomp’06, pp. 177–193.
  15. Intille, S.S., Rondoni, J., Kukla, C., Ancona, I., & Bao, L. A Context-Aware Experience Sampling Tool. CHI’03, pp. 972–973.
  16. Jones, W., & Teevan, J. Personal Information Management. UW Press, 2007.
  17. Li, I., Dey, A.K., & Forlizzi, J. A Stage-Based Model of Personal Informatics Systems. CHI’10, pp. 557–566.
  18. Lin, J.J., Mamykina, L., Lindtner, S., Delajoux, G., & Strub, H.B. Fish’n’Steps: Encouraging Physical Activity with an Interactive Computer Game. Ubicomp’06, pp. 261–278.
  19. Matthews, T., Rattenbury, T., & Carter, S. Defining, designing, and evaluating peripheral displays: an analysis using Activity Theory. Human-Computer Interaction Journal, 22(1), 2007.
  20. Miller, T. & Stasko, J. Artistically Conveying Information with the InfoCanvas: A Highly, Personalized, Elegant Awareness Display. AVI’02.
  21. Peesapati, S.T., Schwanda, V., Schultz, J., Lepage, M., Jeong, S., & Cosley, D. Pensieve: Supporting Everyday Reminiscence. CHI’10, pp. 2027–2036.
  22. Pousman, Z. & Stasko, J. A Taxonomy of Ambient Information Systems: Four Patterns of Design. AVI’06, pp. 67–74.
  23. Powers, W.T. Behavior: The control of perception. Chicago: Alidine, 1973.
  24. Preuveneers, D. & Berbers, Y. Mobile Phones Assisting With Health Self-Care: a Diabetes Case Study. MobileHCI’08, pp. 177–186.
  25. Prochaska, J.O., Velicer, W.F. The Transtheoretical Model of health behavior change. American Journal of Health Promotion, 12(1), 1997, pp. 38–48.
  26. Schank, R.C. & Abelson, R.P. Scripts, plans, goals, and understanding. Hillsdale, NJ: Erlbaum, 1977.
  27. Schunk, D. H., & Swartz, C. W. Goals and progress feedback: Effects on self-efficacy and writing achievement. Contemporary Educational Psychology, 18(3), 1993, pp. 337–354.
  28. Seligman, C., & Delay, J.M. Feedback as a Means of Decreasing Residential Energy Consumption. Journal of Applied Psychology, 62(4), 1977, pp. 363–368.
  29. Weiser, M. The Computer for the 21st Century. SIGMOBILE, 3(3), July 1991, pp. 3–11.
  30. Wolf, G. “The Data-Driven Life.” The New York Times, 28 April 2010.
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