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Decision making in perception and at...

Alford, James Lawrence.

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Decision making in perception and attention.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Decision making in perception and attention./
作者:	Alford, James Lawrence.
面頁冊數:	174 p.
附註:	Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 4124.
Contained By:	Dissertation Abstracts International67-07B.
標題:	Psychology, Psychobiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3224071
ISBN:	9780542766480

Decision making in perception and attention.
Alford, James Lawrence.

Decision making in perception and attention. - 174 p.

Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 4124.

Thesis (Ph.D.)--University of Oregon, 2006.

Models of perceptual decision making describe the interpretation of sensory information as a diffusion or accumulation process. Sensory evidence favoring one of two possible interpretations is accumulated over time in decision modules or neurons until a critical level of evidence is reached, at which point a motor response reflecting that interpretation is triggered. Two of these models (Ratcliff, 1978; Gold & Shadlen, 2002) have assumptions which lead to the specific quantitative prediction that, when observers are responding as accurately as possible, the loglikelihood of a correct response is a function of the rate at which sensory evidence is accumulated. Experiment I demonstrated this to be the case using a standard yes-no signal discrimination task. As observers trade accuracy for speed, it was hypothesized that this decision process would be increasingly contaminated by fast errors as response urgency was manipulated. In experiment II, it was demonstrated that manipulations of response urgency led to distinct, qualitative changes in the shape of latency derived receiver operating characteristics (RT-ROCs) which can be quantified, providing a possible metric with which to measure response urgency. When observers covertly attend to a region of visual space, sensory information within that region is processed faster and more accurately. Experiment III used the LATER model (Carpenter & Williams, 1995) to demonstrate that the quality of sensory information influences the rate at which sensory evidence is accumulated, while covert attention increases both the rate and the variance of sensory evidence accumulation. Visuospatial attention is thought to be mediated by the cholinergic neurotransmitter system. Experiment IV demonstrated that systemic nicotine, a cholinergic agonist, improved the speed at which visual attention is deployed, and appeared to enhance the ability of observers to ignore distracting visual information.

ISBN: 9780542766480Subjects--Topical Terms:

1017821
Psychology, Psychobiology.

Decision making in perception and attention.
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