TY - JOUR
T1 - Roughness perception in haptic virtual reality for sighted and blind people
AU - Kornbrot, D.
AU - Penn, P.
AU - Petrie, H.
AU - Furner, S.
AU - Hardwick, A.
N1 - "This manuscript was accepted for publication in Perception and Psychophysics in 2007. The copyright is held by Psychonomic Society Publications. This document may not exactly correspond to the final published version. Psychonomic Society Publications disclaims any responsibility or liability for errors in this manuscript." Original article can be found (via Ingenta) at: http://www.ingentaconnect.com/content/0031-5117
PY - 2007
Y1 - 2007
N2 - 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 20.80. The implications for theories of roughness, methodologies of data analysis, and the design of haptic virtual reality interfaces are considered.
AB - 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 20.80. The implications for theories of roughness, methodologies of data analysis, and the design of haptic virtual reality interfaces are considered.
KW - rougness
KW - magnitude estimation
KW - blind
KW - visual disability
U2 - 10.3758/BF03193907
DO - 10.3758/BF03193907
M3 - Article
SN - 0031-5117
VL - 69
SP - 502
EP - 512
JO - Perception & Psychophysics
JF - Perception & Psychophysics
IS - 4
ER -