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Memory for color over brief interval...

Morales, Dawn A.

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Memory for color over brief intervals: One capacity or two?

Record Type:	Electronic resources : Monograph/item
Title/Author:	Memory for color over brief intervals: One capacity or two?/
Author:	Morales, Dawn A.
Description:	160 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2414.
Contained By:	Dissertation Abstracts International64-05B.
Subject:	Psychology, Cognitive. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3089470
ISBN:	0496372025

Memory for color over brief intervals: One capacity or two?
Morales, Dawn A.

Memory for color over brief intervals: One capacity or two? - 160 p.

Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2414.

Thesis (Ph.D.)--University of California, San Diego, 2003.

When people remember visual memories with both form and color information, do they rely on one capacity with the ability to represent both kinds of information, or do they rely on different capacities? Observers studied 1, 2, 3, 4, 5, 6, or 7 colors and indicated "same" or "different" to a test sample after a memory delay. Accuracy, measured by d' , steadily declined as the number of colors to be studied increased, but clear evidence of a sharp capacity limit of the sort predicted by the visuo-spatial working memory model was not found.

ISBN: 0496372025Subjects--Topical Terms:

1017810
Psychology, Cognitive.

Memory for color over brief intervals: One capacity or two?
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100 1 $a Morales, Dawn A. $3 1939704
245 1 0 $a Memory for color over brief intervals: One capacity or two?
300 $a 160 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2414.
500 $a Chair: Harold E. Pashler.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2003.
520 $a When people remember visual memories with both form and color information, do they rely on one capacity with the ability to represent both kinds of information, or do they rely on different capacities? Observers studied 1, 2, 3, 4, 5, 6, or 7 colors and indicated "same" or "different" to a test sample after a memory delay. Accuracy, measured by d' , steadily declined as the number of colors to be studied increased, but clear evidence of a sharp capacity limit of the sort predicted by the visuo-spatial working memory model was not found.
520 $a Other observers remembered a color sample and either counted backwards or were not distracted during the memory delay between study and test. The mean difference score between d' for the unfilled and filled delays is not significantly different from zero, suggesting that an attention-dependant process was not used for rehearsal during the delay.
520 $a Other observers remembered colored irregular shapes which varied over three levels of visual complexity, for 2, 7, or 12 seconds, and were then cued as to one of two possible test-types: color or form. Observers classified the test display, which was different (only for the cued dimension) from study on half of the trials, as "same" or "different." Substantial decline as measured by d' and proportion correct occurred for form, but not color information, as visual complexity increased. Accuracy for both information-types declined as inter-stimulus interval (ISI) lengthened; color declined more than form.
520 $a Patients with Schizophrenia with confirmed visuo-spatial working memory impairment as assessed by a neuropsychological measure performed worse on the form memory task than patients whose neuropsychological test scores were within normal range. However, those patients classified as having impaired visuo-spatial working memory were able to remember color as well as those who were not so classified.
520 $a Therefore, memory for color does not require attention-demanding rehearsal and is not impaired when memory for form is impaired in patients with Schizophrenia. Also, the typical sharp capacity limits associated with working memory behavior are not found. Since limited capacity and attention-demanding rehearsal are attributes closely associated with working memory, memory for color may be primarily mediated by long-term memory resources rather than working memory resources, since long-term memory is thought to have a large capacity, not require rehearsal, and is relatively unimpaired in patients with Schizophrenia.
590 $a School code: 0033.
650 4 $a Psychology, Cognitive. $3 1017810
650 4 $a Psychology, Experimental. $3 517106
690 $a 0633
690 $a 0623
710 2 0 $a University of California, San Diego. $3 1018093
773 0 $t Dissertation Abstracts International $g 64-05B.
790 1 0 $a Pashler, Harold E., $e advisor
790 $a 0033
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3089470