Illusory scene shearing during real and illusory self-rotations in roll. Palmisano, S. A., Allison, R. S., & Howard, I. P. In Asia-Pacific Conference on Vision, i-Perception, volume 5, pages 437. 2014. ![Illusory scene shearing during real and illusory self-rotations in roll [pdf]](https://bibbase.org/img/filetypes/pdf.svg "pdf")
Paper -1 abstract bibtex Contrary to long-held assumptions, perceived scene rigidity is not essential for visually induced illusions of self-motion (i.e. vection). Roll vection can be induced by rotating a large homogeneous textured display relative to the upright observer. Under these conditions, the continuous roll vection experienced is paradoxically accompanied by maximum perceived self-tilts of less than 20 degrees (e.g. Howard, Cheung & Landolt, 1989). By contrast, Ian Howard's fully furnished tumbling room apparatus can induce highly compelling illusions of 360 degree (i.e. head-over-heels) self-rotation. We have found that both real and illusory tumbling in his room are accompanied by dramatic illusory scene distortions (scenery near the observer's fixation location sometimes leads and other times lags their more peripheral scenery). The fact that these scene distortion and self-motion illusions co-occur so successfully is both intriguing and a major challenge to existing theories of self-motion perception. Our research has eliminated explanations of these illusory scene shearing effects based on eye-movements, distance misperception, peripheral aliasing, differential motion sensitivity and adaptation. Intriguingly we have consistently found that perceived head-over-heels tumbling (either real or illusory) is the essential prerequisite for the scene shearing illusion.
@incollection{Palmisano:2014mz,
abstract = {Contrary to long-held assumptions, perceived scene rigidity is not essential for visually induced illusions of self-motion (i.e. vection). Roll vection can be induced by rotating a large homogeneous textured display relative to the upright observer. Under these conditions, the continuous roll vection experienced is paradoxically accompanied by maximum perceived self-tilts of less than 20 degrees (e.g. Howard, Cheung & Landolt, 1989). By contrast, Ian Howard's fully furnished tumbling room apparatus can induce highly compelling illusions of 360 degree (i.e. head-over-heels) self-rotation. We have found that both real and illusory tumbling in his room are accompanied by dramatic illusory scene distortions (scenery near the observer's fixation location sometimes leads and other times lags their more peripheral scenery). The fact that these scene distortion and self-motion illusions co-occur so successfully is both intriguing and a major challenge to existing theories of self-motion perception. Our research has eliminated explanations of these illusory scene shearing effects based on eye-movements, distance misperception, peripheral aliasing, differential motion sensitivity and adaptation. Intriguingly we have consistently found that perceived head-over-heels tumbling (either real or illusory) is the essential prerequisite for the scene shearing illusion.},
annote = {APCV 2014 July 2014},
author = {Palmisano, S. A. and Allison, R. S. and Howard, I. P.},
booktitle = {Asia-Pacific Conference on Vision, i-Perception},
date-added = {2014-09-08 14:16:27 +0000},
date-modified = {2014-09-09 18:56:18 +0000},
journal = {i-Perception},
keywords = {Optic flow & Self Motion (also Locomotion & Aviation)},
number = {4},
pages = {437},
title = {Illusory scene shearing during real and illusory self-rotations in roll},
url = {http://i-perception.perceptionweb.com/fulltext/i05/apcv14s.pdf},
url-1 = {http://i-perception.perceptionweb.com/fulltext/i05/apcv14s.pdf},
volume = {5},
year = {2014},
url-1 = {http://i-perception.perceptionweb.com/fulltext/i05/apcv14s.pdf}}
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