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Visual feature integration with an attention deficit.

Examined the role of spatial attention in the feature integration process in brain-damaged patients with a visual attention disorder, using illusory conjunctions. Eight left brain-damaged Ss (mean age 64 yrs) and 10 controls (mean age 71 yrs) were studied. To assess attentional functions, all Ss had previously been tested on visuo-spatial cuing tasks. Of the brain-damaged Ss, 3 showed results that differed from those of controls. These Ss exhibited a massive feature integration deficit for contralesional stimulation relative to ipsilesional displays. In contrast, both controls and brain-damaged Ss who did not exhibit any evidence of an attention deficit showed comparable feature integration performance with left- and right-hemifield stimulation. Results indicate the crucial function of attention for visual feature integration in normal perception. (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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