The effect of directed attention on peripheral discrimination



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The present study investigated the effect of selective attention on the perceptual discrimination of peripherally presented stimuli. Using two brief flashing stimuli, subjects were required to report whether the designated target stimuli appeared to flicker. The results of the study demonstrated that directed attention was of no benefit in the discrimination of such stimuli either to the right or left visual field. Furthermore, it was also concluded that directed attention yields no advantage to the perceptability of a stimulus but rather it only acts to "prepare" an individual to respond to a stimulus in its environment. Finally, no regional (visual hemifield) spatial characteristics were found to contribute to the performance of the subject further suggesting that such discriminations are occurring at midbrain areas which do not differentially analyze visual input.



Visual perception, Attention