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[169] Citation: Abstract
Many tasks may be performed with greater efficiency and speed with hapticas
sistance. Using the Penbased Haptic Display, a low-power, low-friction, and
high-precision device, we performed two separate experiments to measure two
properties of human/haptic interactions. In the first ex-periment, we measured
the level of force at which a subject may detect the presence of haptic feedback
at a 71% accuracy level using a converging adaptive threshold algorithm. The
average haptic threshold of eleven subjects was 20.8 milliNewtons. The second
experiment quantifies changes in task performance using Fitts Law. We measured
improve-ments at three force levels compared to no force.
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Updated: Tue Jul 15 23:54:51 2008
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