title: Specificity and generalization of visual perceptual learning in humans: an event-related potential study.
abstract: To investigate the neural correlates of specificity and generalization of visual perceptual learning, we recorded event-related potentials from human adults when they were trained with a simple visual discrimination task. While reaction times decreased significantly across training sessions, event-related potentials showed larger P2 amplitudes ( approximately 210 ms) over the left occipital/parietal areas and smaller N1 amplitudes ( approximately 140 ms) at the left parietal site with more practice. Similar to reaction times, the training effect on the P2 amplitudes was specific to stimulus orientation. However, the N1 effect was generalized over differently oriented stimuli. These results indicated the complexity of the neural substance underlying perceptual learning, relative to behavioral level.
authors.affiliation: Beijing Laboratory of Cognitive Science, School of Life Sciences, University of Science and Technology of China, Beijing, China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Ding
authors.forename: Yan
authors.initials: Y
authors.lastname: Song
authors.forename: Silu
authors.initials: S
authors.lastname: Fan
authors.forename: Zhe
authors.initials: Z
authors.lastname: Qu
authors.forename: Lin
authors.initials: L
authors.lastname: Chen
mesh_terms: D000328:Adult; D004193:Discrimination Learning / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D005793:Generalization, Psychological / Q000502:physiology*; D006801:Humans; D008297:Male; D009778:Occipital Lobe / Q000502:physiology; D009949:Orientation / Q000502:physiology; D010296:Parietal Lobe / Q000502:physiology; D010775:Photic Stimulation; D011930:Reaction Time; D014796:Visual Perception / Q000502:physiology*