Semantic object processing is modulated by prior scene context

  • Objects that are congruent with a scene are recognised more efficiently than objects that are incongruent. Further, semantic integration of incongruent objects elicits a stronger N300/N400 EEG component. Yet, the time course and mechanisms of how contextual information supports access to semantic object information is unclear. We used computational modelling and EEG to test how context influences semantic object processing. Using representational similarity analysis, we established that EEG patterns dissociated between objects in congruent or incongruent scenes from around 300 ms. By modelling semantic processing of objects using independently normed properties, we confirm that the onset of semantic processing of both congruent and incongruent objects is similar (∼150 ms). Critically, after ∼275 ms, we discover a difference in the duration of semantic integration, lasting longer for incongruent compared to congruent objects. These results constrain our understanding of how contextual information supports access to semantic object information.

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Author:Alexandra KrugliakORCiD, Dejan DraschkowORCiDGND, Melissa Lê-Hoa VõORCiDGND, Alex ClarkeORCiDGND
Parent Title (English):bioRxiv
Document Type:Preprint
Date of Publication (online):2022/10/27
Date of first Publication:2022/10/27
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/09/01
Issue:2022.10.26.513851 Version 1
Edition:Version 1
Page Number:13
Institutes:Psychologie und Sportwissenschaften / Psychologie
Dewey Decimal Classification:1 Philosophie und Psychologie / 15 Psychologie / 150 Psychologie
Licence (German):License LogoCreative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International