Abstract
The difference threshold (DL) for brief tactile stimuli (taps) and vibrotactile stimuli was determined using a 2IFC procedure. The measurements were made at several intensities both in quiet and in the presence of a background vibration. The results show that in the absence of background vibration the DLs for higher intensity stimuli are similar for both taps and vibration, whereas at lower intensities the DL is larger for taps. In the presence of background vibration the DL for vibratory stimuli is elevated to a much greater extent than it is for tap stimuli. The DL is affected by both the intensity of the signal and the intensity of the background vibration.
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This study was supported by a Biomedical Sciences Support grant from PHS to Indiana University. Part of the research reported in this paper was conducted while the author held a summer faculty research fellowship from Indiana University.
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Craig, J.C. Difference threshold for intensity of tactile stimuli. Perception & Psychophysics 11, 150–152 (1972). https://doi.org/10.3758/BF03210362
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DOI: https://doi.org/10.3758/BF03210362