Abstract
Previous studies have found a late frontal–central audiovisual interaction during the time period about 150–220ms post-stimulus. However, it is unclear to which process is this audiovisual interaction related: to processing of acoustical features or to classification of stimuli? To investigate this question, event-related potentials were recorded during a words-categorization task with stimuli presented in the auditory–visual modality. In the experiment, congruency of the visual and auditory stimuli was manipulated. Results showed that within the window of about 180–210ms post-stimulus more positive values were elicited by category-congruent audiovisual stimuli than category-incongruent audiovisual stimuli. This indicates that the late frontal–central audiovisual interaction is related to audiovisual integration of semantic category information.
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