Exploring the Organization of Semantic Memory through Unsupervised Analysis of Event-related Potentials

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author van Vliet, Marijn
dc.contributor.author Van Hulle, Marc
dc.contributor.author Salmelin, Riitta
dc.date.accessioned 2018-02-09T09:58:24Z
dc.date.available 2018-02-09T09:58:24Z
dc.date.issued 2018-03
dc.identifier.citation van Vliet , M , Van Hulle , M & Salmelin , R 2017 , ' Exploring the Organization of Semantic Memory through Unsupervised Analysis of Event-related Potentials ' JOURNAL OF COGNITIVE NEUROSCIENCE . DOI: 10.1162/jocn_a_01211 en
dc.identifier.issn 0898-929X
dc.identifier.issn 1530-8898
dc.identifier.other PURE UUID: 5bd465b4-0ab2-4334-a711-0e0bc3b3fd97
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/exploring-the-organization-of-semantic-memory-through-unsupervised-analysis-of-eventrelated-potentials(5bd465b4-0ab2-4334-a711-0e0bc3b3fd97).html
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/27884560/jocn_a_01211.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/29840
dc.description.abstract Modern multivariate methods have enabled the application of unsupervised techniques to analyze neurophysiological data without strict adherence to predefined experimental conditions. We demonstrate a multivariate method that leverages priming effects on the evoked potential to perform hierarchical clustering on a set of word stimuli. The current study focuses on the semantic relationships that play a key role in the organization of our mental lexicon of words and concepts. The N400 component of the event-related potential is considered a reliable neurophysiological response that is indicative of whether accessing one concept facilitates subsequent access to another (i.e., one “primes” the other). To further our understanding of the organization of the human mental lexicon, we propose to utilize the N400 component to drive a clustering algorithm that can uncover, given a set of words, which particular subsets of words show mutual priming. Such a scheme requires a reliable measurement of the amplitude of the N400 component without averaging across many trials, which was here achieved using a recently developed multivariate analysis method based on beamforming. We validated our method by demonstrating that it can reliably detect, without any prior information about the nature of the stimuli, a well-known feature of the organization of our semantic memory: the distinction between animate and inanimate concepts. These results motivate further application of our method to data-driven exploration of disputed or unknown relationships between stimuli. en
dc.format.extent 12
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries JOURNAL OF COGNITIVE NEUROSCIENCE en
dc.rights openAccess en
dc.subject.other Cognitive Neuroscience en
dc.subject.other 3112 Neurosciences en
dc.subject.other Systemic and cognitive neuroscience en
dc.title Exploring the Organization of Semantic Memory through Unsupervised Analysis of Event-related Potentials en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Neuroscience and Biomedical Engineering
dc.contributor.department KU Leuven
dc.subject.keyword Cognitive Neuroscience
dc.subject.keyword 3112 Neurosciences
dc.subject.keyword Systemic and cognitive neuroscience
dc.identifier.urn URN:NBN:fi:aalto-201802091336
dc.identifier.doi 10.1162/jocn_a_01211
dc.date.embargo info:eu-repo/date/embargoEnd/2018-04-30

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