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Event-related potential correlates o...

Watson, Todd Derrick.

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Event-related potential correlates of cognitive operations in a modified Wisconsin Card Sorting Task.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Event-related potential correlates of cognitive operations in a modified Wisconsin Card Sorting Task./
作者:	Watson, Todd Derrick.
面頁冊數:	182 p.
附註:	Adviser: Nancy K. Squires.
Contained By:	Dissertation Abstracts International66-09B.
標題:	Psychology, Psychobiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3189393
ISBN:	9780542321122

Event-related potential correlates of cognitive operations in a modified Wisconsin Card Sorting Task.
Watson, Todd Derrick.

Event-related potential correlates of cognitive operations in a modified Wisconsin Card Sorting Task. - 182 p.

Adviser: Nancy K. Squires.

Thesis (Ph.D.)--State University of New York at Stony Brook, 2005.

The Wisconsin Card Sorting Test (WCST) is one of the most commonly administered neuropsychological tasks, and is considered by many to be the prototypical test of frontal lobe and executive function. However, the utility of the original version of the WCST to study prefrontal function is limited, as it is difficult to dissociate the multiple implicit cognitive demands that contribute to task performance. It is likely that WCST performance is composed of a number of discrete cognitive elements, only some of which are controlled by the fronto-striatal system. The primary goal of my dissertation was to utilize the excellent temporal resolution of Event-Related Potentials (ERPs) to dissociate the neural correlates of different cognitive elements that are required to make successful set-shifts (rule changes) in the WCST. Healthy, young adult participants were presented with novel, modified versions of the WCST (and appropriate control conditions) designed to isolate specific cognitive elements of task performance. Three separate experiments were conducted. The primary comparisons in these studies were between the neural correlates of: (A) Shifting Set vs. Maintenance of Set, (B) Extradimensional vs. Intradimensional Set Shifts, (C) Extradimensional Set Shifts and Stimulus-Response Reversal Learning, and (D) the effects of Perseveration and Learned Irrelevance on Extradimensional set shifting. A secondary goal of these studies was to examine the neural correlates of receiving positive and negative feedback in the WCST. As hypothesized, both early sensory and longer latency ERP components were found to discriminate between different cognitive elements of WCST performance. These electrophysiological findings coincided with changes in response time and error rates between conditions. Overall, these studies indicate that the ability to shift set is sub served by multiple cognitive operations with dissociable neural correlates. The implications of these finding on theories of the neuropsychology of executive functions are discussed.

ISBN: 9780542321122Subjects--Topical Terms:

1017821
Psychology, Psychobiology.

Event-related potential correlates of cognitive operations in a modified Wisconsin Card Sorting Task.
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