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“Beating” Fitts ’ Law: Virtual Enhancements for Point Facilitation

“Beating” Fitts ’ Law: Virtual Enhancements for Point Facilitation. Ravin Balakrishnan. Brandon Taylor CS Mini Spring 2013 . Fitts ’ Law. T = time, D = distance, W = target size. Explanations. Iterative Corrections Model Result of closed-loop feedback control Impulse Variability Model

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“Beating” Fitts ’ Law: Virtual Enhancements for Point Facilitation

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  1. “Beating” Fitts’ Law: Virtual Enhancements for Point Facilitation RavinBalakrishnan Brandon Taylor CS Mini Spring 2013

  2. Fitts’ Law T = time, D = distance, W = target size

  3. Explanations • Iterative Corrections Model • Result of closed-loop feedback control • Impulse Variability Model • Result of Initial Muscle movement • Hybrid Model

  4. Virtual Enviroments C-D Tx Function Display Space Control Space

  5. Minimizing D (1)

  6. Minimizing D (2)

  7. Minimizing D (3)

  8. Increasing W (1)

  9. Increasing W (2)

  10. Adjust C-D Transfer Function

  11. Conclusions • It’s a mixed bag • Touch interfaces may change things

  12. Discussion • How have touchscreens impacted pointing? Are C-D transfer function obsolete? • Does Fitts’ Law apply to portable devices? • How do Gestures and probabilistic inputs impact interactions?

  13. Phone Text Entry Swype Minuum

  14. Ffitts Law

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