A scale for rate of tactual vibration

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Abstract
Observers were asked to make estimates of the rate of mechanical vibrations presented to the finger as pulses ranging from 2 to .apprx. 300 pps. From the functions generated by this study, a set of 10 values of mechanical vibration rate was selected. In a 2nd experiment additional observers were asked to learn to identify these values of rate. Information analysis of the data showed that, when rate alone is varied, observers can identify between 3 and 5 items correctly; when rate and intensity are covaried redundantly, between 5 and 8 items can be identified correctly. These results are viewed as supporting those from studies of the DL for rate, and as evidence for a limited but useful role of rate discrimination in tactile displays of acoustic signals.

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