Haptic Input


What is haptic? haptic comes from Greek word meaning "touch" or "contact". Thus, haptic input is the input that involves the physical contact between the computer and the user through input devices such a mouse, a joystick and so on.

Investigating the effectiveness of different kind of haptic input devices

  • Each input device has its own strengths and weaknesses.
  • One of the problems that confront the designer is to obtain a match between application and input technology.
  • Experiment with a diverse set of representative tasks.
  • Developing a strong understanding of the characteristics of several input.
  • Determine which properties are relevant to a particular application.


Testing methods:

Pursuit Tracking:

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  • The main statistic in this test is how many times the fly can be swatted in a given time interval.
  • Developing an understanding on the task performance. One of these is the speed that the targets move.
  • Control Display ratio C:D the ratio between the distance the controller must be moved in order to cause the tracker to move a given distance on the display.

Target Acquisition:


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  • The user must select each of a number of squares
  • A square is selected by positioning the tracking symbol over it and signaling the system with a button event.
  • The main statistic to consider how long it takes to select the full set of targets.
  • Examine how target size affects the speed of target acquisition.

Constrained Linear Motion, Constrained Circular Motion


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1. Using the scroll-bar or thumb wheel mechanism to move the object rapidly to a straight line path.
  • Different devices vary in ease with which can be done.
2. How fast can the tracking symbol be moved around the circular shaded path with crossing the borders?
  • Different results will be obtained from different devices and also vary according to C:D ratio and the width of the path

References:
http://www.billbuxton.com/MKhaptic.html