Document Detail

The role of gist in scene recognition.
MedLine Citation:
PMID:  18692519     Owner:  NLM     Status:  MEDLINE    
Studies of change blindness suggest that we bring only a few attended features of a scene, plus a gist, from one visual fixation to the next. We examine the role of gist by substituting an original image with a second image in which a substitution of one object changes the gist, compared with a third image in which a substitution of that object does not change the gist. Small perceptual changes that affect gist were more rapidly detected than perceptual changes that do not affect gist. When the images were scrambled to remove meaning, this difference disappeared for seven of the nine sets, indicating that gist and not image features dominated the result. In a final experiment a natural image was masked with an 8x8 checker pattern, and progressively substituted by squares of a new natural image of the same gist. Spatial jitter prevented fixation on the same square for the sequence of 12 changes. Observers detected a change in an average of 2.1 out of 7 sequences, indicating strong change blindness for images of the same gist but completely different local features. We conclude that gist is automatically encoded, separately from specific features.
Anthony Chad Sampanes; Philip Tseng; Bruce Bridgeman
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Publication Detail:
Type:  Journal Article     Date:  2008-08-22
Journal Detail:
Title:  Vision research     Volume:  48     ISSN:  1878-5646     ISO Abbreviation:  Vision Res.     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-22     Completed Date:  2008-12-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  2275-83     Citation Subset:  IM    
Department of Psychology, University of California, Santa Cruz, Social Sciences 2, Santa Cruz, CA 95064, USA.
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MeSH Terms
Attention / physiology
Discrimination (Psychology) / physiology
Field Dependence-Independence
Generalization, Stimulus / physiology*
Pattern Recognition, Visual / physiology
Perceptual Masking / physiology
Photic Stimulation / methods
Recognition (Psychology) / physiology*
Visual Perception / physiology*

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

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