Abstract/Details

How does attention aid visual perception: Support for enhanced resolution


1999 1999

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Abstract (summary)

It is well known that attention can improve performance in a variety of tasks. A crucial unsettled issue is whether this improvement is due to noise reduction (internal or external), a change in decisional criteria, features binding, or signal enhancement. By combining peripheral precues with Visual Search (Chapter 1), Acuity, and Hyperacuity (Chapter 2) tasks we show that attention improves performance by signal enhancement. Specifically, we claim that attention increases the spatial resolution at the attended location.

The use of a texture segregation task in which performance is actually diminished due to enhanced spatial resolution provides the principal evidence for this claim (Chapter 3). We observed that attention improved performance at peripheral locations where spatial resolution was too low, but impaired performance at central locations where spatial resolution was too high. The counterintuitive impairment of performance that we found at the central locations appears to have only one possible explanation: attention enhances spatial resolution. Further manipulations of the texture's spatial frequency indicated that these attentional effects reflect changes in second-order filters (Chapter 4).

Indexing (details)


Subject
Cognitive therapy
Classification
0633: Cognitive therapy
Identifier / keyword
Psychology; Attention; Enhanced resolution; Peripheral cues; Spatial resolution; Visual perception
Title
How does attention aid visual perception: Support for enhanced resolution
Author
Yeshurun, Yaffa
Number of pages
162
Publication year
1999
Degree date
1999
School code
0146
Source
DAI-B 60/09, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780599473225, 0599473223
Advisor
Carrasco, Marisa
University/institution
New York University
University location
United States -- New York
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
9945372
ProQuest document ID
304515743
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304515743
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