| The orientation dependence of the Hermann grid illusion. | |
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MedLine Citation:
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PMID: 14610627 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The Hermann grid illusion (HGI), elicited by a grid displayed as either horizontal-vertical (HV) or oblique (45 degrees ) configuration, was measured as the luminance necessary to cancel the illusory spots at the grid intersections. Overall, the HGI produced by the oblique grid was about one-third of that produced by the HV grid. The observers exhibited different sensitivities to the HGI orientation, and seemed to perceive the illusion in two manners: with moderate anisotropy (reduction of about 20%, three subjects) or large anisotropy (90% reduction, four subjects). The quantitative reduction of the HGI elicited by the oblique pattern tested and its reduction to almost zero in some subjects, constitute a benchmark for any model aimed at explaining the HGI on psychophysical grounds. |
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Authors:
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Victor De Lafuente; Octavio Ruiz |
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Publication Detail:
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Type: Journal Article Date: 2003-11-11 |
Journal Detail:
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Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 154 ISSN: 0014-4819 ISO Abbreviation: Exp Brain Res Publication Date: 2004 Jan |
Date Detail:
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Created Date: 2003-12-19 Completed Date: 2004-05-03 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: Germany |
Other Details:
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Languages: eng Pagination: 255-60 Citation Subset: IM |
Affiliation:
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Departamento de Fisiologia, Biofisica y Neurociencias, Centro de Investigacion y de Estudios Avanzados del IPN, Av. IPN 2508 07360, Mexico DF, Mexico. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Anisotropy Contrast Sensitivity / physiology Cues* Female Humans Illusions / physiology* Lighting Male Models, Neurological Observer Variation Orientation / physiology* Pattern Recognition, Visual / physiology* Photic Stimulation Space Perception / physiology* Visual Fields / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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