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Autoren: Berti, Stefan
Titel: Switching attention within working memory is reflected in the P3a component of the human event-related brain potential
Online-Publikationsdatum: 17-Okt-2022
Erscheinungsdatum: 2016
Sprache des Dokuments: Englisch
Zusammenfassung/Abstract: The flexible access to information in working memory is crucial for adaptive behavior. It is assumed that this is realized by switching the focus of attention within working memory. Switching of attention is mirrored in the P3a component of the human event-related brain potential (ERP) and it has been argued that the processes reflected by the P3a are also relevant for selecting information within working memory. The aim of the present study was to further evaluate whether the P3a mirrors genuine switching of attention within working memory by applying an object switching task: Participants updated a memory list of four digits either by replacing one item with another digit or by processing the stored digit. ERPs were computed separately for two types of trials: (1) trials in which an object was repeated and (2) trials in which a switch to a new object was required in order to perform the task. Object-switch trials showed increased response times compared with repetition trials in both task conditions. In addition, switching costs were increased in the processing compared with the replacement condition. Pronounced P3a’s were obtained in switching trials but there were no difference between the two updating tasks (replacement or processing). These results were qualified by the finding that the magnitude of the visual location shift also affects the ERPs in the P3a time window. Taken together, the present pattern of results suggest that the P3a reflects an initial process of selecting information in working memory but not the memory updating itself.
DDC-Sachgruppe: 150 Psychologie
150 Psychology
Veröffentlichende Institution: Johannes Gutenberg-Universität Mainz
Organisationseinheit: FB 02 Sozialwiss., Medien u. Sport
Veröffentlichungsort: Mainz
Version: Published version
Publikationstyp: Zeitschriftenaufsatz
Nutzungsrechte: CC BY
Informationen zu den Nutzungsrechten:
Zeitschrift: Frontiers in human neuroscience
Seitenzahl oder Artikelnummer: Art. 701
Verlag: Frontiers Research Foundation
Verlagsort: Lausanne
Erscheinungsdatum: 2016
ISSN: 1662-5161
URL der Originalveröffentlichung:
DOI der Originalveröffentlichung: 10.3389/fnhum.2015.00701
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