The Misperception of Length in Vision, Haptics and Audition

Participants felt, saw and heard stimuli travel over predetermined distances in three orientations --- gravitational-vertical, radial and horizontal. On all trials participants were required to judge the length of the distance travelled. Judgments based on visual information over-estimated length in the radial direction, while those based on haptic information overestimated length in the gravitational-vertical direction. Length estimates based on auditory information were similar across the three orientations. A combined modality condition using visual, haptic and auditory information mimicked the vision condition. Results are interpreted in light of the horizontal-vertical illusion.

[1]  T. Künnapas.  The vertical-horizontal illusion and the visual field. , 1957 .

[2]  B. Slotnick,et al.  The Horizontal Vertical Illusion: Evidence for Strategic Factors in Feedback-Induced Illusion Decrement , 1996, Perceptual and motor skills.

[3]  K Suzuki,et al.  Geometrical haptic illusions revisited: Haptic illusions compared with visual illusions , 1992, Perception & psychophysics.

[4]  R. Day,et al.  Basis of the horizontal-vertical illusion. , 1969, Journal of experimental psychology.

[5]  Per E. Roland,et al.  Somatosensory detection of microgeometry, macrogeometry and kinesthesia after localized lesions of the cerebral hemispheres in man , 1987, Brain Research Reviews.

[6]  W H Tedford,et al.  Tactual and visual illusions in the T-shaped figure. , 1969, Journal of experimental psychology.

[7]  Susanna Millar,et al.  The Müller-Lyer illusion in touch and vision: Implications for multisensory processes , 2002, Perception & psychophysics.

[8]  C M Taylor.  Visual and Haptic Perception of the Horizontal-Vertical Illusion , 2001, Perceptual and motor skills.

[9]  Charles H. Bean.  The blind have "optical illusions." , 1938 .

[10]  T S Wong,et al.  Dynamic properties of radial and tangential movements as determinants of the haptic horizontal--vertical illusion with an L figure. , 1977, Journal of experimental psychology. Human perception and performance.

[11]  Laurent Renier,et al.  Vertical-horizontal illusion present for sighted but not early blind humans using auditory substitution of vision , 2006, Perception & psychophysics.

[12]  V. Camos,et al.  The Visual and the Haptic Müller-Lyer Illusions: Correlation Study , 2004 .

[13]  D. H. Warren,et al.  Sensory conflict in judgments of spatial direction , 1969 .