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How are visual working memory repres...

Hyun, Joo-Seok.

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How are visual working memory representations compared with perceptual inputs?

Record Type:	Language materials, printed : Monograph/item
Title/Author:	How are visual working memory representations compared with perceptual inputs?/
Author:	Hyun, Joo-Seok.
Description:	79 p.
Notes:	Adviser: Steven J. Luck.
Contained By:	Dissertation Abstracts International67-07B.
Subject:	Psychology, Cognitive. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3225624
ISBN:	9780542795428

How are visual working memory representations compared with perceptual inputs?
Hyun, Joo-Seok.

How are visual working memory representations compared with perceptual inputs? - 79 p.

Adviser: Steven J. Luck.

Thesis (Ph.D.)--The University of Iowa, 2006.

The human visual system can notice differences between memories of previous visual inputs and perceptions of new visual inputs, but the comparison process underlying this ability has not been well characterized. A series of behavioral, event-related potential (ERP) and eye-tracking experiments tested if this comparison process is limited or unlimited in capacity. Subjects performed a task in which they looked for a changed item among non-changing items (any-difference task) and a task in which they looked for a single non-changing item among changing items (any-sameness task). Responses became slower and less accurate as the number of items increased in both tasks, but this effect was much greater in the any-sameness task. In addition, increasing the number of items in the any-difference task had little or no impact on the latency of eye movements toward the changed item or on the latency of the N2pc component of the ERP waveform, an index of attention. Further experiments showed that the comparison process is prone to interference from pattern masks and can operate on a selected subset of features by voluntary control. The results together suggest that comparisons between visual working memory and perceptual inputs can be accomplished by a combination of unlimited and limited-capacity processes.

ISBN: 9780542795428Subjects--Topical Terms:

1017810
Psychology, Cognitive.

How are visual working memory representations compared with perceptual inputs?
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100 1 $a Hyun, Joo-Seok. $3 1291171
245 1 0 $a How are visual working memory representations compared with perceptual inputs?
300 $a 79 p.
500 $a Adviser: Steven J. Luck.
500 $a Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 4126.
502 $a Thesis (Ph.D.)--The University of Iowa, 2006.
520 $a The human visual system can notice differences between memories of previous visual inputs and perceptions of new visual inputs, but the comparison process underlying this ability has not been well characterized. A series of behavioral, event-related potential (ERP) and eye-tracking experiments tested if this comparison process is limited or unlimited in capacity. Subjects performed a task in which they looked for a changed item among non-changing items (any-difference task) and a task in which they looked for a single non-changing item among changing items (any-sameness task). Responses became slower and less accurate as the number of items increased in both tasks, but this effect was much greater in the any-sameness task. In addition, increasing the number of items in the any-difference task had little or no impact on the latency of eye movements toward the changed item or on the latency of the N2pc component of the ERP waveform, an index of attention. Further experiments showed that the comparison process is prone to interference from pattern masks and can operate on a selected subset of features by voluntary control. The results together suggest that comparisons between visual working memory and perceptual inputs can be accomplished by a combination of unlimited and limited-capacity processes.
590 $a School code: 0096.
650 4 $a Psychology, Cognitive. $3 1017810
650 4 $a Psychology, Experimental. $3 517106
650 4 $a Psychology, Physiological. $3 1017869
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710 2 0 $a The University of Iowa. $3 1017439
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