Guided search is a mechanism that controls and optimizes the deployment of attention during visual search and allows one to pay attention only to highly relevant items. For instance, when searching for a conjunction of two features, we are able to select a feature-marked subset (e.g., all items...

Two, logically distinct but sometimes compatible, mechanisms of camouflage are background-matching and disruptive coloration. In the former, an animal's coloration comprises a random sample of the background, and so target--background discrimination is impeded. In the latter, object or feature...