The author is in the Dept. of Human Neurobiology, University of Bremen, Argonnenstr. 3, D-28211 Bremen, Germany and Department of Optometry, City University, London, EC1V 0HB, UK mfahle@uni-bremen.de
Using a clever stimulus that separates local from global motion features, the authors of a new paper show that perceptual learning occurs at low cortical levels when the motion is irrelevant to the observer's task, whereas higher-level learning of the same stimulus requires attention.
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