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Differential Electrophysiological Signatures of Semantic and Syntactic Scene Processing
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Differential Electrophysiological Signatures of Semantic and Syntactic Scene Processing
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Journal Article
Differential Electrophysiological Signatures of Semantic and Syntactic Scene Processing
2013
Overview
In sentence processing, semantic and syntactic violations elicit differential brain responses observable in event-related potentials: An N400 signals semantic violations, whereas a P600 marks inconsistent syntactic structure. Does the brain register similar distinctions in scene perception? To address this question, we presented participants with semantic inconsistencies, in which an object was incongruent with a scene's meaning, and syntactic inconsistencies, in which an object violated structural rules. We found a clear dissociation between semantic and syntactic processing: Semantic inconsistencies produced negative deflections in the N300-N400 time window, whereas mild syntactic inconsistencies elicited a late positivity resembling the P600 found for syntactic inconsistencies in sentence processing. Extreme syntactic violations, such as a hovering beer bottle defying gravity, were associated with earlier perceptual processing difficulties reflected in the N300 response, but failed to produce a P600 effect. We therefore conclude that different neural populations are active during semantic and syntactic processing of scenes, and that syntactically impossible object placements are processed in a categorically different manner than are syntactically resolvable object misplacements.
Publisher
SAGE Publications,Sage Publications,SAGE PUBLICATIONS, INC
Subject
/ Biological and medical sciences
/ Brain
/ Electroencephalography - methods
/ Evoked Potentials - physiology
/ Fundamental and applied biological sciences. Psychology
/ Grammar
/ Gravity
/ Hovering
/ Humans
/ Male
/ Photic Stimulation - methods
/ Psychology. Psychoanalysis. Psychiatry
/ Psychology. Psychophysiology
/ Syntax
/ Vision
