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A dynamic view of movement planning.

McDowell, Kaleb G.

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A dynamic view of movement planning.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A dynamic view of movement planning./
作者:	McDowell, Kaleb G.
面頁冊數:	96 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5766.
Contained By:	Dissertation Abstracts International64-11B.
標題:	Psychology, General. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3112491
ISBN:	0496600036

A dynamic view of movement planning.
McDowell, Kaleb G.

A dynamic view of movement planning. - 96 p.

Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5766.

Thesis (Ph.D.)--University of Maryland, College Park, 2003.

For over a century, it has been known that increasing the number of stimulus-response alternatives or decreasing the probability of a stimulus-response alternative increases the time to respond to a stimulus. This signal-uncertainty effect provides an important constraint for understanding mental architecture. However, recent neural population vector based approaches for studying the cognitive processes involved in movement preparation appear at odds with this classic result. Using goal-directed arm movements to examine the interaction between number/probability of stimulus-response pairings and response metrics, we reproduced the signal-uncertainty effect for sufficiently dissimilar responses. However, when the responses were metrically close we observed for the first time an inversion of signal-uncertainty effect. A modulation of the signal-uncertainty effect by response metrics were also observed for electrophysiological (P300) measures which supports blurring the distinction between cognitive and motor processing. Dynamic Field Theory, a population vector based approach incorporating local facilitation and global inhibition, provides an unified account of the task metrics and signal-uncertainty.

ISBN: 0496600036Subjects--Topical Terms:

1018034
Psychology, General.

A dynamic view of movement planning.
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520 $a For over a century, it has been known that increasing the number of stimulus-response alternatives or decreasing the probability of a stimulus-response alternative increases the time to respond to a stimulus. This signal-uncertainty effect provides an important constraint for understanding mental architecture. However, recent neural population vector based approaches for studying the cognitive processes involved in movement preparation appear at odds with this classic result. Using goal-directed arm movements to examine the interaction between number/probability of stimulus-response pairings and response metrics, we reproduced the signal-uncertainty effect for sufficiently dissimilar responses. However, when the responses were metrically close we observed for the first time an inversion of signal-uncertainty effect. A modulation of the signal-uncertainty effect by response metrics were also observed for electrophysiological (P300) measures which supports blurring the distinction between cognitive and motor processing. Dynamic Field Theory, a population vector based approach incorporating local facilitation and global inhibition, provides an unified account of the task metrics and signal-uncertainty.
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