Document Detail

Thickness and the Koffka ring effect.
MedLine Citation:
PMID:  18986071     Owner:  NLM     Status:  MEDLINE    
Over seven decades ago Gestalt psychologist Kurt Koffka described a remarkable effect: when a contiguous gray ring is placed on a background half of one shade of gray, half of another, the ring appears homogeneous. However, if the ring is slightly divided, the two halves of the ring appear different shades of gray, the half of the ring on the darker background appearing lighter than the half of the ring on the lighter background. The Gestalt principle of continuity is used to explain this effect. We show that when the ring is made thinner it appears heterogeneous even when contiguous. We also illustrate this in the additional material with a colored background with more than two regions.
Abigail E Huang; Alice J Hon; Eric Lewin Altschuler
Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Perception     Volume:  37     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  2008  
Date Detail:
Created Date:  2008-11-06     Completed Date:  2008-12-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  England    
Other Details:
Languages:  eng     Pagination:  1458-60     Citation Subset:  IM    
School of Medicine, University of Medicine & Dentistry of New Jersey, 150 Bergen Street, Newark, NJ 07103, USA.
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MeSH Terms
Color Perception / physiology
Contrast Sensitivity / physiology*
Form Perception / physiology*
Middle Aged
Optical Illusions*

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