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Active VisionThe Psychology of Looking and Seeing$
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John M Findlay and Iain D Gilchrist

Print publication date: 2003

Print ISBN-13: 9780198524793

Published to Oxford Scholarship Online: January 2008

DOI: 10.1093/acprof:oso/9780198524793.001.0001

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Active Vision

John M. Findlay

Oxford University Press

This chapter is concerned with the process of finding a visual target amongst other distractor items. It starts with a discussion of traditional theories of visual search, including Feature Integration Theory, Guided Search, and the late-selection model of Duncan and Humphreys. It is argued that all these models are inadequate because they do not account for, or integrate eye movements into the search process. The chapter reviews evidence demonstrating that saccades are a ubiquitous characteristic of search, and then discusses what determines where saccades go in search and what determines when they are generated. The following sections discuss ocular capture and the characteristics of search scanpaths. Finally, the physiology of visual search is reviewed. The chapter argues that the consideration of saccadic behaviour must be at the centre of any model or description of the search process.

Keywords:   targets, distractors, feature integration theory, guided search theory, late-selection model, ocular capture, scanpaths, salience map, physiology

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