Perception & Psychophysics

, Volume 69, Issue 4, pp 502–512

Roughness perception in haptic virtual reality for sighted and blind people

  • Diana Kornbrot
  • Paul Penn
  • Helen Petrie
  • Stephen Furner
  • Andrew Hardwick
Article

DOI: 10.3758/BF03193907

Cite this article as:
Kornbrot, D., Penn, P., Petrie, H. et al. Perception & Psychophysics (2007) 69: 502. doi:10.3758/BF03193907
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Abstract

Psychophysical functions for perceived roughness, relating ln (magnitude estimate of roughness) to ln (groove width), were obtained for blind and sighted participants in virtual reality using the PHANToM force feedback device. The stimuli were sinusoidal surfaces with groove widths between 0.675 mm and 20.700 mm. Group functions showed a similar nonlinearity to those obtained in physical reality using rigid probes (Klatzky, Lederman, Hamilton, Grindley, & Swendsen, 2003; Lederman, Klatzky, Hamilton, & Ramsay, 1999). Individual functions gave a different picture. Of 23 total participants, there were 13 with wholly descending linear psychometric functions, 7 with quadratic functions similar to the group function, and 3 with anomalous functions. Individual power law exponents showed no significant effects of visual status. All analyses gave a power law exponent close to −0.80. The implications for theories of roughness, methodologies of data analysis, and the design of haptic virtual reality interfaces are considered.

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Copyright information

© Psychonomic Society, Inc. 2007

Authors and Affiliations

  • Diana Kornbrot
    • 2
  • Paul Penn
    • 2
  • Helen Petrie
    • 2
  • Stephen Furner
    • 1
  • Andrew Hardwick
    • 1
  1. 1.BT Group Chief Technology OfficeUK
  2. 2.School of PsychologyUniversity of Hertfordshire, College LaneHatfieldEngland

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