Document Detail

Evidence for gating of direct response activation in the Simon task.
MedLine Citation:
PMID:  16082807     Owner:  NLM     Status:  MEDLINE    
The Simon effect denotes faster responses when the task-irrelevant stimulus position corresponds to the response position than when it does not. Accounts of this effect assume that stimulus position automatically activates a spatially corresponding response while the correct response is being computed. Yet the Simon effect has been found to be reduced after noncorresponding trials. Some authors have interpreted these sequential modulations of the Simon effect as evidence for a mechanism gating position-based response activation. Alternatively, sequential modulations have been explained in terms of feature-integration processes, which depend upon the fact that different sequences of spatial-correspondence conditions covary with different degrees of feature overlap between subsequent trials. The present study investigates whether sequential modulations of the Simon effect can occur when feature overlap in the different conditions is the same. Therefore, a Simon task with four stimulus positions and two response positions was used. Sequential modulations of the Simon effect were found in trial sequences with constant amounts of feature overlap between trials. Although the feature-integration account cannot explain this result, it is consistent with the idea of a gating (i.e., cognitive control) mechanism.
Peter Wühr
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Psychonomic bulletin & review     Volume:  12     ISSN:  1069-9384     ISO Abbreviation:  Psychon Bull Rev     Publication Date:  2005 Apr 
Date Detail:
Created Date:  2005-08-08     Completed Date:  2005-11-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502924     Medline TA:  Psychon Bull Rev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  282-8     Citation Subset:  IM    
Institut für Psychologie I, Friedrich-Alexander Universität, Kochstrasse 4, 91054 Erlangen, Germany .
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MeSH Terms
Reaction Time*
Space Perception*

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

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