Perceptual centering effects in body orientation

This study mathematically characterizes the results of DiZio and Lackner (Percept Psychphys 39(1): 39-46) on the perception of self-orientation during circular vection induced by an optokinetic stimulus. Using the hypothesis of perceptual centering, it is shown that five basic centering transformati...

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Bibliographic Details
Published in:Biological cybernetics 2006-04, Vol.94 (4), p.288-299
Main Author: Hanes, D A
Format: Article
Language:English
Subjects:
Adaptation, Physiological - physiology
Algorithms
Body Image
Cybernetics
Eyes & eyesight
Feedback - physiology
Fixation, Ocular - physiology
Humans
Illusions - physiology
Kinetics
Models, Neurological
Motion Perception - physiology
Orientation - physiology
Posture - physiology
Psychomotor Performance - physiology
Reflex, Vestibulo-Ocular - physiology
Sensory perception
Space Perception - physiology
Vestibule, Labyrinth - physiology
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Summary:This study mathematically characterizes the results of DiZio and Lackner (Percept Psychphys 39(1): 39-46) on the perception of self-orientation during circular vection induced by an optokinetic stimulus. Using the hypothesis of perceptual centering, it is shown that five basic centering transformations can logically account for the full range of illusions reported by the subjects. All five of these transformations center the perceived orientations of body components, the rotating disk, and gravity : two align the perceived visual and inertial rotation axes, one centers the perceived axis of visual rotation in front of the head, and two straighten the perceived neck angle. These transformations generate a mathematical semigroup. Application of the semigroup to an actual stimulus condition generates an orbit of predicted illusions. The semigroup analysis of perceptual centering predicts all of the illusions observed in the experiments of DiZio and Lackner (Percept Psychphys 39(1): 39-46). Moreover, the structure of perceptual centering (1) provides a logical explanation for the occurrence of those misperceptions; and (2) predicts the complete set of perceptions that are expected to occur in a larger sample. In addition, our analysis predicts illusions in experimental conditions not yet investigated.
ISSN:0340-1200
1432-0770
DOI:10.1007/s00422-005-0048-2