Moving Tactile Cues on Human Torso Expand Perceived Time
Tue-A6-Talk V-02
Presented by: Bora Celebi
Spatially congruent visual cueing prolongs the perceived duration of visual stimuli (Seifried & Ulrich, 2011). Additionally, moving visual cues compared to static cues expand perceived duration in a particularly effective manner. Previously, we showed that a congruent vibrotactile cue on the human torso similarly expands perceived duration of a subsequent tactile stimulus. In the present study, we investigated how movement and spatial congruency of the tactile cue influence perceived duration on the human torso. To this end, we used dynamic and static vibrotactile cues. The dynamic cue composed of successive vibrotactile stimulation from neighboring actuators starting from the middle-lower abdomen and finishing at the upper chest while the static cue was a simultaneous vibrotactile stimulation through the same actuators (middle-lower abdomen to upper chest). Both cues lasted 250 ms and were either presented spatially congruent (left or right torso) or incongruent with the stimulus. In a temporal bisection task, participants categorized the duration of each stimulus (300 - 800ms) as short or long in reference to previously learnt durations. Perceived duration was longer after dynamic cues as compared to static cues. However, the spatial congruency of the torso side (left vs. right) did not influence the perceived time. We suggest that tactile attention stretches perceived time on the human torso, and that it is particularly efficiently caught by dynamic cues independent of the exact location.
Keywords: motion, tactile perception, timing, time perception