Document Detail

Geometrical haptic illusions: the role of exploration in the Müller-Lyer, vertical-horizontal, and Delboeuf illusions.
MedLine Citation:
PMID:  15116983     Owner:  NLM     Status:  MEDLINE    
This article surveys studies of the occurrence, in the haptic modality, of three geometrical illusions well known in vision, and it discusses the nature of the processes underlying these haptic illusions. We argue that the apparently contradictory results found in the literature concerning them may be explained, at least partially, by the characteristics of manual exploratory movements. The Müller-Lyer illusion is present in vision and in haptics and seems to be the result of similar processes in the two modalities. The vertical-horizontal illusion also exists in vision and haptics but is due partly to similar processes (bisection) and partly to processes specific to each modality (anisotropy of the visual field and overestimation of radial vs. tangential manual exploratory movements). The Delboeuf illusion seems to occur only in vision, probably because exploration by the index finger may exclude the misleading context from tactile perception. The role of these haptic exploratory movements may explain why haptics is as sensitive as vision to certain illusions and less sensitive to others.
Edouard Gentaz; Yvette Hatwell
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Psychonomic bulletin & review     Volume:  11     ISSN:  1069-9384     ISO Abbreviation:  Psychon Bull Rev     Publication Date:  2004 Feb 
Date Detail:
Created Date:  2004-04-30     Completed Date:  2004-07-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9502924     Medline TA:  Psychon Bull Rev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  31-40     Citation Subset:  IM    
Laboratory of Cognition and Development, Université René Descartes, Paris V and CNRS, Paris, France.
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MeSH Terms
Form Perception*
Motion Perception
Optical Illusions*
Perceptual Masking
Visual Perception

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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