This study investigates the human recognition performance of vibrotactile stimuli applied on the torso along azimuth or elevation under the context of tactile egocentric directional cueing. We conducted two absolute identification experiments for azimuth and elevation, respectively, using real tactile stimuli generated by physical actuators and illusory stimuli rendered by funneling illusion. For both azimuth and elevation, the recognition accuracies were very high, over 95.6%, when only real stimuli were used to indicate 6–8 directions. However, combining the real stimuli with the illusory ones to double the spatial resolution resulted in significantly lower accuracies between 74.1% and 77.8%. The estimated information transfer (IT) values also remained very similar. Using identical methods, our results quantify the human identification performance of torso-distributed tactile stimuli for azimuth or elevation. The detailed results provide general guidelines for designing torso-based tactile systems to enhance spatial awareness and navigation.

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Human Identification Performance of Vibrotactile Stimuli Applied on the Torso Along Azimuth or Elevation

  • Junwoo Kim,
  • Jaejun Park,
  • Chaeyong Park,
  • Junseok Park,
  • Seungmoon Choi

摘要

This study investigates the human recognition performance of vibrotactile stimuli applied on the torso along azimuth or elevation under the context of tactile egocentric directional cueing. We conducted two absolute identification experiments for azimuth and elevation, respectively, using real tactile stimuli generated by physical actuators and illusory stimuli rendered by funneling illusion. For both azimuth and elevation, the recognition accuracies were very high, over 95.6%, when only real stimuli were used to indicate 6–8 directions. However, combining the real stimuli with the illusory ones to double the spatial resolution resulted in significantly lower accuracies between 74.1% and 77.8%. The estimated information transfer (IT) values also remained very similar. Using identical methods, our results quantify the human identification performance of torso-distributed tactile stimuli for azimuth or elevation. The detailed results provide general guidelines for designing torso-based tactile systems to enhance spatial awareness and navigation.