title: Illusory rotation in the haptic perception of a moving bar.
abstract: Haptic matching of the orientation of bars separated by a horizontal distance leads to large systematic deviations. This finding leads to the following intriguing question which we investigated in this study: How will a bar moving from left to right in a fixed orientation be perceived by blindfolded observers? Interestingly, this previous finding predicts that the translating bar will cause the illusory perception of a rotation. In our experiment, we used psychophysical methods to determine the rotation needed to perceive the bar as non-rotating, for both rightward and leftward translations. From our results, it can be estimated that, on average, a bar translating in parallel over 60 cm is perceived as rotating 18°, so we established that the predicted illusory rotation indeed exists. This implies that static and dynamic signals are processed in a similar way.
authors.affiliation: Faculty of Human Movement Sciences, VU University Amsterdam, Van der Boechorststraat 7-9, 1081 BT, Amsterdam, The Netherlands, a.m.l.kappers@vu.nl.
authors.forename: Astrid M L
authors.initials: AM
authors.lastname: Kappers
authors.forename: Wouter M
authors.initials: WM
authors.lastname: Bergmann Tiest
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009949:Orientation / Q000502:physiology*; D010465:Perception / Q000502:physiology*; D011601:Psychophysics; D012399:Rotation; D014110:Touch / Q000502:physiology*; D055815:Young Adult
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