Feature integration theory: Difference between revisions

Revision as of 17:33, 13 January 2012

Revision as of 21:31, 26 April 2012

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[[File:FITstages.png|alt=The stages of Feature Integration Theory.]]

It was widely speculated that the saliency map could be located in early visual cortical areas, e.g. the [[Primary Visual Cortex]] (V1), though this is controversial. Wolfe's popular Guided Search Model offers a more up to date theory of visual search but is also problematic. <ref>Wolfe JM, Cave KR, Franzel SL. (1989) Guided search: an alternative to the feature integration model for visual search. ''Journal Experimental Psychological: Human Perception Performance.'' 1989 Aug;15(3):419-33. {{cite PMID|2527952}}</ref>

Treisman distinguishes between two kinds of visual search tasks, "feature search" and "conjunction search". Feature searches can be performed fast and pre-attentively for targets defined by only one primitive feature, such as color, shape, movement or orientation. Conjunction searches proceed serially for targets defined by a conjunction (two or more) of primitive features - it is much slower and requires conscious attention. She concluded from many experiments that [[color]], [[Orientation (geometry)|orientation]], and [[intensity (disambiguation)|intensity]] are primitive features, for which feature searches may be performed.