Christian Holz
  • Researcher in Human-Computer Interaction at Yahoo Labs, Sunnyvale, CA


Ultra-mobile devices that support spatial interaction

My research is based on the observation that the miniaturization of mobile devices has come to a halt, because input controls have to be large enough to be operated. However, this halt is not due to hardware limitations.
I believe that further miniaturization and thus true ubiquity of mobile devices requires a better understanding of human factors. In my research, I investigate human mental models to create ultra-small touch devices.


  1. Chen, Y., Bentley, F., Holz, C. and Xu, C. Sharing (and Discussing) the Moment: The Conversations that Occur Around Shared Mobile Media. To appear in Proceedings of MobileHCI '15, 10 pages.
  2. Holz, C., Bentley, F., Church, K. and Patel, M. "I’m just on my phone and they’re watching TV": Quantifying mobile device use while watching television. To appear in Proceedings of TVX '15, 10 pages.
  3. Holz, C., Buthpitiya, S. and Knaust, M. Bodyprint: Biometric User Identification on Mobile Devices Using the Capacitive Touchscreen to Scan Body Parts. In Proceedings of CHI '15, 3011–3014.
    Bodyprint project
  4. Bentley, F., Chen, Y. and Holz, C. Reducing the Stress of Coordination: Sharing Travel Time Information Between Contacts on Mobile Phones. In Proceedings of CHI '15, 967–970. Honorable mention.
    Time Away project
  5. Holz, C. and Baudisch, P. Fiberio: A Touchscreen That Senses Fingerprints. In Proceedings of UIST '13, 41–50. Best paper award.
    Fiberio project
  6. Baudisch, P., Pohl, H., Reinicke, S., Wittmers, E., Luehne, P., Knaust, M., Koehler, S., Schmidt, P. and Holz, C. Imaginary Reality Gaming: Ball Games Without a Ball. In Proceedings of UIST '13, 405–410.
    QuantumBall project
  7. Steins, C., Gustafson, S., Holz, C. and Baudisch, P. Imaginary Devices: Gesture-Based Interaction Mimicking Traditional Input Devices. In Proceedings of MobileHCI '13, 123–126.
    Imaginary Devices project
  8. Braenzel, A., Holz, C., Hoffmann, D., Schmidt, D., Knaust, M., Luehne, P., Meusel, R., Richter, S. and Baudisch, P. GravitySpace: Tracking Users and Their Poses in a Smart Room Using a 2D Pressure-Sensing Floor. In Proceedings of CHI '13, 725–734. Honorable mention.
    GravitySpace project
  9. Holz, C., Grossman, T., Fitzmaurice, G. and Agur, A. Implanted User Interfaces. In Proceedings of CHI '12, 503–512.
    Implanted User Interfaces project
  10. Richter, S., Holz, C. and Baudisch, P. Bootstrapper: Recognizing Tabletop Users by their Shoes. In Proceedings of CHI '12, 1249–1252.
    Bootstrapper project
  11. Gustafson, S., Holz, C. and Baudisch, P. Imaginary Phone: Learning Imaginary Interfaces by Transferring Spatial Memory from a Familiar Device. In Proceedings of UIST '11, 283–292.
    Imaginary Phone project
  12. Holz, C. and Wilson, A.D. Data Miming: Inferring Spatial Object Descriptions from Human Gesture. In Proceedings of CHI '11, 811–820.
    Data Miming project
  13. Holz, C. and Baudisch, P. Understanding Touch. In Proceedings of CHI '11, 2501–2510.
    Understanding Touch project
  14. Augsten, T., Kaefer, K., Meusel, R., Fetzer, C., Kanitz, D., Stoff., T., Becker, T., Holz, C. and Baudisch, P. Multitoe: High-Precision Interaction with Back-Projected Floors Based on High-Resolution Multi-Touch Input. In Proceedings of UIST '10, 209–218.
    Multitoe project
  15. The Generalized Perceived Input Point Model project
  16. Holz, C. and Feiner, S. Relaxed Selection Techniques for Querying Time-Series Graphs. In Proceedings of UIST '09, 213–222.
    Relaxed Selection Techniques project