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  Identifying object categories from event-related EEG: Toward decoding of conceptual representations

Simanova, I., Van Gerven, M., Oostenveld, R., & Hagoort, P. (2010). Identifying object categories from event-related EEG: Toward decoding of conceptual representations. Plos One, 5(12), E14465. doi:10.1371/journal.pone.0014465.

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© 2010 Simanova et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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 Creators:
Simanova, Irina1, Author           
Van Gerven, Marcel2, 3, Author
Oostenveld, Robert2, Author           
Hagoort, Peter1, 2, Author           
Affiliations:
1Neurobiology of Language Group, MPI for Psycholinguistics, Max Planck Society, ou_102880              
2Donders Institute for Brain, Cognition and Behaviour, External Organizations, ou_55236              
3Institute for Computing and Information Sciences, ou_persistent22              

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 Abstract: Multivariate pattern analysis is a technique that allows the decoding of conceptual information such as the semantic category of a perceived object from neuroimaging data. Impressive single-trial classification results have been reported in studies that used fMRI. Here, we investigate the possibility to identify conceptual representations from event-related EEG based on the presentation of an object in different modalities: its spoken name, its visual representation and its written name. We used Bayesian logistic regression with a multivariate Laplace prior for classification. Marked differences in classification performance were observed for the tested modalities. Highest accuracies (89% correctly classified trials) were attained when classifying object drawings. In auditory and orthographical modalities, results were lower though still significant for some subjects. The employed classification method allowed for a precise temporal localization of the features that contributed to the performance of the classifier for three modalities. These findings could help to further understand the mechanisms underlying conceptual representations. The study also provides a first step towards the use of concept decoding in the context of real-time brain-computer interface applications.

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 Dates: 2010
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1371/journal.pone.0014465
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Title: Plos One
Source Genre: Journal
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Pages: - Volume / Issue: 5 (12) Sequence Number: - Start / End Page: E14465 Identifier: ISSN: 1932-6203
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000277850