Abstract/Details

Cognitive and neural mechanisms that support retrieval from working memory


2008 2008

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Abstract (summary)

Most complex cognitive skills require access to representations formed as the products of recent perceptual and cognitive operations. A small subset of these representations can be maintained in the current focus of attention, and are readily available to be employed for ongoing cognitive processes. In contrast, representations that fall outside the contents of focal attention need to be brought back from memory to be restored to active processing. A series of studies investigate how recently processed information is retrieved from memory. Two complementary methodologies were used to examine the behavioral and neural mechanisms that underlie short-term or working memory retrieval operations: The speed-accuracy trade-off (SAT) procedure was used to independently measure the probability of retrieval success (availability of the memory representation) and retrieval dynamics (the speed with which the memory representation can be accessed), and to further characterize the differential contributions of automatic and controlled processes to these retrieval operations. Functional magnetic resonance imaging (fMRI) was used to provide converging evidence to the behavioral findings and to identify the neural bases of the cognitive processes identified from the behavioral analyses.

Collectively, the studies indicate that the nature of the retrieval operation is determined by the type of information that needs to be accessed and the amount of interference present in the retrieval context. Results further indicate that the left inferior prefrontal cortex, the left posterior parietal cortex, and the medial temporal lobes jointly support working memory retrieval.

Indexing (details)


Subject
Neurosciences;
Experimental psychology;
Cognition & reasoning;
Memory
Classification
0317: Neurosciences
0623: Experimental psychology
Identifier / keyword
Psychology; Biological sciences; Focal attention; Item recognition; Proactive interference; Retrieval; Temporal order memory; Working memory
Title
Cognitive and neural mechanisms that support retrieval from working memory
Author
Oztekin, Ilke
Number of pages
174
Publication year
2008
Degree date
2008
School code
0146
Source
DAI-B 69/09, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549822998
Advisor
McElree, Brian
Committee member
Davachi, Lila; Murphy, Gregory; Rehder, Bob; Smith, Edward
University/institution
New York University
Department
Psychology
University location
United States -- New York
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3330164
ProQuest document ID
304526821
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304526821/abstract
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