Abstract/Details

Exploring the relationship between visual search and visual discrimination


1995 1995

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Abstract (summary)

The present study examined the effect of set size and target-distractor discriminability on contrast and orientation search performance in central vision for six observers. Set size was manipulated through display set size and the target-distractor discriminability was defined as the ratio of target-distractor difference to the corresponding discrimination threshold. Results agreed with studies in peripheral vision and showed a constant set size effect across different domains of the study (the accuracy domain and the time domain) and different dimensions of stimuli (contrast and orientation). The slopes of the set size effect were also similar to the prediction of the decision integration hypothesis, suggesting that an attentional effect in the decision process was sufficient to account for the set size effect in central vision. Results also showed that the target-distractor discriminability was a determining factor for simple visual search performance. The search duration threshold versus target-distractor discriminability functions were comparable for stimuli within or across stimulus dimensions.

Indexing (details)


Subject
Psychology;
Experiments
Classification
0623: Psychology
0623: Experiments
Identifier / keyword
Psychology, contrast, orientation
Title
Exploring the relationship between visual search and visual discrimination
Author
Zhang, Lan
Number of pages
176
Publication year
1995
Degree date
1995
School code
0659
Source
DAI-B 56/09, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
University/institution
Syracuse University
University location
United States -- New York
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
9544971
ProQuest document ID
304258558
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304258558
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