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Comparison of the Methods of Limits and Electrodermal Response for Determination of Lingual Vibrotactile Thresholds

Lingual vibrotactile thresholds were obtained from 30 adult Ss by the method of limits and operant conditioning of the electrodermal response. Sensitivity of the tongue was measured at 250 Hz. Comparisons of lingual threshold data showed that thresholds obtained by the method of limits were significantly lower than those obtained by the electrodermal response technique. There was a moderate positive correlation between methods however, indicating a substantial relationship. It was concluded that consistent lingual vibrotactile indexes of sensitivity can be obtained using an electrodermal response approach.