Some temporal parameters in vibrotactile forward masking.

Tactile thresholds for detecting a 250-Hz signal of variable duration presented at variable times after the termination of a 250-Hz 700-ms masking stimulus were measured. It was found that the threshold shift resulting from the presentation of the masking stimulus declined as functions of the duration of the signal and the duration of the time interval between the masking stimulus and signal. Both of these effects were found to be attributable to an increase in the time interval between the offset of the masking stimulus and the offset of the signal.