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- W2094735650 abstract "Face recognition emerges from an interaction between bottom-up and top-down processing. Specifically, it relies on complex associations between the visual representation of a given face and previously stored knowledge about that face (e.g. biographical details). In the present experiment, the time-course of the interaction between bottom-up and top-down processing was investigated using event-related potentials (ERPs) and manipulating realistic, ecological contextual information. In the study phase, half of the faces (context faces) were framed in a newspaper page entitled with an action committed by the person depicted; these actions could have a positive or a negative value, so in this way emotional valence could be manipulated. The other half was presented on a neutral background (no-context faces). In the test phase, previously presented faces and new ones were presented on neutral backgrounds and an old/new discrimination was requested. The N170 component was modulated by both context (presence/absence at encoding) and valence (positive/negative). A reduction in amplitude was found for context faces as opposed to no-context faces. The same pattern was observed for negative faces compared to positive ones. Moreover, later activations associated with context and valence were differentially distributed over the scalp: context effects were prominent in left frontal areas, traditionally linked to person-specific information retrieval, whereas valence effects were broadly distributed over the scalp. In relation to recent neuroimaging findings on the neural basis of top-down modulations, present findings indicate that the information flow from higher-order areas might have modulated the N170 component and mediated the retrieval of semantic information pertaining to the study episode." @default.
- W2094735650 created "2016-06-24" @default.
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- W2094735650 date "2006-11-01" @default.
- W2094735650 modified "2023-10-17" @default.
- W2094735650 title "“Did you see him in the newspaper?” Electrophysiological correlates of context and valence in face processing" @default.
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- W2094735650 doi "https://doi.org/10.1016/j.brainres.2006.08.076" @default.
- W2094735650 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17005161" @default.
- W2094735650 hasPublicationYear "2006" @default.
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