Perceiving the vertical distances of surfaces by means of a hand-held probe.

@article{Chan1991PerceivingTV,
  title={Perceiving the vertical distances of surfaces by means of a hand-held probe.},
  author={Tommy C. L. Chan and Michael T. Turvey},
  journal={Journal of experimental psychology. Human perception and performance},
  year={1991},
  volume={17 2},
  pages={347-58}
}
Nine experiments were conducted on the haptic capacity of people to perceive the distances of horizontal surfaces solely on the basis of mechanical stimulation resulting from contacting the surfaces with a vertically held rod. Participants touched target surfaces with rods inside a wooden cabinet and reported the perceived surface location with an indicator outside the cabinet. The target surface, rod, and the participant's hand were occluded, and the sound produced in exploration was muffled… CONTINUE READING