Document Detail

Dual-task interference in visual working memory: a limitation in storage capacity but not in encoding or retrieval.
MedLine Citation:
PMID:  19933566     Owner:  NLM     Status:  MEDLINE    
The concurrent maintenance of two visual working memory (VWM) arrays can lead to profound interference. It is unclear, however, whether these costs arise from limitations in VWM storage capacity (Fougnie & Marois, 2006) or from interference between the storage of one visual array and encoding or retrieval of another visual array (Cowan & Morey, 2007). Here, we show that encoding a VWM array does not interfere with maintenance of another VWM array unless the two displays exceed maintenance capacity (Experiments 1 and 2). Moreover, manipulating the extent to which encoding and maintenance can interfere with one another had no discernable effect on dual-task performance (Experiment 2). Finally, maintenance of a VWM array was not affected by retrieval of information from another VWM array (Experiment 3). Taken together, these findings demonstrate that dual-task interference between two concurrent VWM tasks is due to a capacity-limited store that is independent from encoding and retrieval processes.
Daryl Fougnie; René Marois
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Attention, perception & psychophysics     Volume:  71     ISSN:  1943-393X     ISO Abbreviation:  Atten Percept Psychophys     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-11-25     Completed Date:  2010-02-01     Revised Date:  2013-05-31    
Medline Journal Info:
Nlm Unique ID:  101495384     Medline TA:  Atten Percept Psychophys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1831-41     Citation Subset:  IM    
Department of Psychology, Vanderbilt University, 627 Wilson Hall, 111 21st Ave S., Nashville, TN 37203, USA.
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MeSH Terms
Choice Behavior
Color Perception*
Conflict (Psychology)
Discrimination (Psychology)*
Memory, Short-Term*
Pattern Recognition, Visual*
Reaction Time
Retention (Psychology)
Young Adult
Grant Support
R01 MH070776-01/MH/NIMH NIH HHS; R01 MH070776-02/MH/NIMH NIH HHS; R01 MH070776-03/MH/NIMH NIH HHS; R01 MH070776-04/MH/NIMH NIH HHS; R01 MH070776-05/MH/NIMH NIH HHS; R01-MH70776/MH/NIMH NIH HHS

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