Vibrotactile Stimulation: An Investigation of Psychophysical Methods for Establishing Threshold

Abstract
This investigation was designed to adopt and evaluate the psychophysical method of limits and method of adjustment using ascending and descending stimuli series to obtain oral vibrotactile thresholds on the anterior midline surface of the tongue. A significant difference in vibrotactile thresholds was not found with either the method of limits or the method of adjustment. The differences between ascending and descending thresholds were also not significant.