DERIVATION AND TEST OF AN OPTIMUM OVERLAPPING-LOBES MODEL OF VISUAL-SEARCH

Citation
A. Baveja et al., DERIVATION AND TEST OF AN OPTIMUM OVERLAPPING-LOBES MODEL OF VISUAL-SEARCH, IEEE transactions on systems, man and cybernetics. Part A. Systems and humans, 26(1), 1996, pp. 161-168
Citations number
23
Categorie Soggetti
System Science",Ergonomics,"Computer Science Cybernetics
ISSN journal
10834427
Volume
26
Issue
1
Year of publication
1996
Pages
161 - 168
Database
ISI
SICI code
1083-4427(1996)26:1<161:DATOAO>2.0.ZU;2-0
Abstract
The visual search process is modeled as a sequence of fixations which may or may not partially overlap in coverage of the search field. A si ngle expression is derived for the probability of search success which covers all overlap cases. Making the further assumption that search s trategy is chosen so as to maximize expected value, yields the result that each point on the search field must be fixated an integral number of times. In an experiment where visual lobe size and fixation durati on were controlled, human subjects behaved in a manner close to that p redicted by the optimization model. It is concluded that further devel opment of the model using less restrictive assumptions is warranted.