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Révész (1934) reported that haptic illusions were observed in almost all of the geometrical optical illusion figures. The present study reexamined seven geometrical illusions in both haptic and visual modes. In the Müller-Lyer, Ponzo, and vertical-horizontal figures, haptic illusions equivalent to the visual illusions were observed. In the Oppel-Kundt figure, a haptic illusion similar to the visual one was obtained. In the haptic Delboeuf stimuli, the size illusion of the outer circle occurred, whereas that of the inner circle did not. No haptic illusion was obtained in the Poggendorff figure. In the Zöllner figure, a haptic illusion directionally opposite to the visual one was obtained. These results show that haptic illusions do not occur in all of the geometrical illusion figures. They also suggest that haptic illusions are not necessarily mediated by visualization and that haptic processing of the figures often occurs in a manner different from vision.
K Suzuki, and
R Arashida
May 2014,
Attention, perception & psychophysics,
K Suzuki, and
R Arashida
February 2004,
Psychonomic bulletin & review,
K Suzuki, and
R Arashida
March 2004,
Vision research,
K Suzuki, and
R Arashida
January 2023,
Frontiers in psychology,
K Suzuki, and
R Arashida
April 2008,
Brain research bulletin,
K Suzuki, and
R Arashida
May 2005,
Neuroscience and behavioral physiology,
K Suzuki, and
R Arashida
December 1968,
Psychological bulletin,
