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NYU psychology researchers show how attention enhances visual perception

Researchers at New York University have determined the location in the brain where involuntary attention enhances visual processing. The researchers, from NYU's Department of Psychology and Center for Neural Science, found that attending to, or selectively processing information from a given location without directing our eyes to that location, enhances performance in visual tasks as well as the neural activity underlying the processing of ensuing images. The results are published in the latest issue of the journal Neuron.

A sudden appearance of an object in our visual field will grab our attention--causing an involuntary reaction. Taosheng Liu, Franco Pestilli, and Marisa Carrasco, the researchers for the Neuron study, have previously investigated this process. Behavioral research from the Carrasco lab has shown that involuntary, or transient, attention improves performance in simple, early visual processing tasks--it actually helps us see things better. The NYU study in Neuron shows the neural basis of this effect. It identifies an increase in neural activity in areas of the brain that respond to the attended stimulus--that is, to the information that is selectively processed at a given location.

In this study, the researchers presented observers with two patches simultaneously in the periphery of their line of sight on a computer display: one tilted (target) and one vertical (distracter). They were asked to indicate whether the target was tilted to the right or to the left. Each display was preceded by a cue that was either on the same (cued location) or the opposite (uncued location) side of the target [see diagram of experimental trial]. The purpose of the pre-cue was to automatically attract observers' attention to its location. Importantly, the cue was completely uninformative regarding both target location and orientation, and observers were told so. Although there was no incentive to use the cue, observers still performed better when the t
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Contact: James Devitt
james.devitt@nyu.edu
212-998-6808
New York University
9-Feb-2005


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