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Top-down and bottom-up processes in ...

Proulx, Michael J.

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Top-down and bottom-up processes in visual search.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Top-down and bottom-up processes in visual search./
Author:	Proulx, Michael J.
Description:	123 p.
Notes:	Adviser: Howard Egeth.
Contained By:	Dissertation Abstracts International66-12B.
Subject:	Biology, Neuroscience. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3197220
ISBN:	9780542430497

Top-down and bottom-up processes in visual search.
Proulx, Michael J.

Top-down and bottom-up processes in visual search. - 123 p.

Adviser: Howard Egeth.

Thesis (Ph.D.)--The Johns Hopkins University, 2006.

The role of top-down and bottom-up processes in visual search is a crucial topic that has received considerable attention. This dissertation first reviews the literature on the visual attributes that guide attention in visual search. It is argued that studies of attentional capture should play an important role in determining these guiding attributes. Attentional capture paradigms are well-suited for unveiling the search strategies that subjects use in visual search and for understanding the relative roles of bottom-up and top-down guidance. Several studies have addressed the issue of search strategy in visual search for a single feature (e.g., Bacon & Egeth, 1994; Theeuwes, 1991). Although additional studies have addressed the role of top-down and bottom-up processes in conjunction search with unequal distractor ratios (e.g., Bacon & Egeth, 1997; Sobel & Cave, 2002), only two experiments have attempted to examine this issue by modifying a standard conjunction search task with equal distractor ratios (Lamy & Tsal, 1999; Friedman-Hill & Wolfe, 1995). A novel visual search procedure was designed for this dissertation to address the role of top-down and bottom-up processes in visual search for conjunctions. The main result is that, surprisingly, bottom-up processes guide attention in a conjunction search task.

ISBN: 9780542430497Subjects--Topical Terms:

1017680
Biology, Neuroscience.

Top-down and bottom-up processes in visual search.
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100 1 $a Proulx, Michael J. $3 1291132
245 1 0 $a Top-down and bottom-up processes in visual search.
300 $a 123 p.
500 $a Adviser: Howard Egeth.
500 $a Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6945.
502 $a Thesis (Ph.D.)--The Johns Hopkins University, 2006.
520 $a The role of top-down and bottom-up processes in visual search is a crucial topic that has received considerable attention. This dissertation first reviews the literature on the visual attributes that guide attention in visual search. It is argued that studies of attentional capture should play an important role in determining these guiding attributes. Attentional capture paradigms are well-suited for unveiling the search strategies that subjects use in visual search and for understanding the relative roles of bottom-up and top-down guidance. Several studies have addressed the issue of search strategy in visual search for a single feature (e.g., Bacon & Egeth, 1994; Theeuwes, 1991). Although additional studies have addressed the role of top-down and bottom-up processes in conjunction search with unequal distractor ratios (e.g., Bacon & Egeth, 1997; Sobel & Cave, 2002), only two experiments have attempted to examine this issue by modifying a standard conjunction search task with equal distractor ratios (Lamy & Tsal, 1999; Friedman-Hill & Wolfe, 1995). A novel visual search procedure was designed for this dissertation to address the role of top-down and bottom-up processes in visual search for conjunctions. The main result is that, surprisingly, bottom-up processes guide attention in a conjunction search task.
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650 4 $a Psychology, Experimental. $3 517106
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