Document Detail

Inhomogeneous surrounds, conflicting frameworks, and the double-anchoring theory of lightness.
MedLine Citation:
PMID:  16724764     Owner:  NLM     Status:  MEDLINE    
The empirical question of whether or not the lightness of a region is accounted for purely by the average luminance of its surround has a complex answer that depends on whether such a region is an increment, a decrement, or intermediate relative to the luminances of the contiguous surfaces. It is shown here that a new model of lightness, based on anchoring principles, predicts and clarifies such intricacies. In this model, the luminance of the target region determines its lightness in two ways: indirectly, by causing it to group with parts of its surround and thus defining the nested frameworks to which it belongs; and directly, by anchoring it to the highest luminance and to the average surround luminance in each of these frameworks. Inter- and intraindividual differences in lightness assessment are shown to emerge under grouping conditions that create unstable, conflicting frameworks.
Paola Bressan
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Psychonomic bulletin & review     Volume:  13     ISSN:  1069-9384     ISO Abbreviation:  Psychon Bull Rev     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-05-26     Completed Date:  2006-10-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502924     Medline TA:  Psychon Bull Rev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  22-32     Citation Subset:  IM    
Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131 Padova, Italy.
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MeSH Terms
Conflict (Psychology)*
Contrast Sensitivity*
Field Dependence-Independence*
Psychological Theory*

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