Effect of space between fingers on tactile duration discrimination
The purpose of this study was to examine how space between tactile stimuli marking time affects the processing of duration. Twelve participants were recruited in an experiment where the method of constant stimuli was used. Eight participants perceived empty time intervals as longer when the intervals were marked by two electric pulses stimulating different (middle and little) fingers than the same (middle) finger while four participants perceived intervals as shorter when two pulses were delivered to different fingers. However, increasing the angle between the middle and little fingers did not magnify the spatial effect in both groups of participants. Finally, discrimination level remained the same regardless of whether participants overestimated or underestimated intervals marked by two pulses stimulating different fingers.