Document Detail

On the time course of perceptual information that results from a brief visual presentation.
MedLine Citation:
PMID:  1593234     Owner:  NLM     Status:  MEDLINE    
A briefly presented visual stimulus engenders an available-information function that lags behind the physical stimulus. We report two experiments that focus on the iconic-decay portion of this function, which falls to 0 over a 200-300 ms period following stimulus offset. In each experiment, to-be-reported digit strings were shown for varying durations followed by a noise mask at varying poststimulus intervals. We found the shape of the performance curve relating digit-report probability to stimulus exposure duration to be independent of stimulus-mask interstimulus interval. This finding is consistent with the proposition that the iconic-decay function's shape is independent of stimulus duration and allows us to identify this shape. We rejected exponential iconic decay for 6 of 8 observers; however, all observers' decay functions could be adequately fit by gamma decay, a generalization of exponential decay.
G R Loftus; J Duncan; P Gehrig
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of experimental psychology. Human perception and performance     Volume:  18     ISSN:  0096-1523     ISO Abbreviation:  J Exp Psychol Hum Percept Perform     Publication Date:  1992 May 
Date Detail:
Created Date:  1992-07-01     Completed Date:  1992-07-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7502589     Medline TA:  J Exp Psychol Hum Percept Perform     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  530-49; discussion 550-61     Citation Subset:  IM    
Department of Psychology, University of Washington, Seattle 98195.
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MeSH Terms
Discrimination Learning
Figural Aftereffect*
Mental Recall*
Pattern Recognition, Visual*
Perceptual Masking
Reaction Time*

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

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