Eye movement statistics in humans are consistent with an optimal search strategy.

ABSTRACT: Most models of visual search are based on the intuition that humans choose fixation locations containing features that best match the features of the target. The optimal version of this feature-based strategy is what we term "maximum a posteriori (MAP) search." Alternatively, humans could choose fixations that maximize information gained about the target's location. We term this information-based strategy "ideal search." Here we compare eye movements of human, MAP, and ideal searchers in tasks where known targets are embedded at unknown locations within random backgrounds having the spectral characteristics of natural scenes. We find that both human and ideal searchers preferentially fixate locations in a donut-shaped region around the center of the circular search area, with a high densit

SUBMITTER: Najemnik J 

PROVIDER: S-EPMC2868380 | biostudies-literature | 2008 Mar

REPOSITORIES: biostudies-literature