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  The temporal evolution of conceptual object representations revealed through models of behavior, semantics and deep neural networks

Bankson, B. B., Hebart, M. N., Groen, I. I. A., & Baker, C. I. (2018). The temporal evolution of conceptual object representations revealed through models of behavior, semantics and deep neural networks. NeuroImage, 178, 172-182. doi:10.1016/j.neuroimage.2018.05.037.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-20C0-D Version Permalink: http://hdl.handle.net/21.11116/0000-0005-5860-C
Genre: Journal Article

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 Creators:
Bankson, B. B.1, Author
Hebart, Martin N.1, Author              
Groen, I. I. A.1, Author
Baker, C. I.1, Author
Affiliations:
1External Organizations, ou_persistent22              

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 Abstract: Visual object representations are commonly thought to emerge rapidly, yet it has remained unclear to what extent early brain responses reflect purely low-level visual features of these objects and how strongly those features contribute to later categorical or conceptual representations. Here, we aimed to estimate a lower temporal bound for the emergence of conceptual representations by defining two criteria that characterize such representations: 1) conceptual object representations should generalize across different exemplars of the same object, and 2) these representations should reflect high-level behavioral judgments. To test these criteria, we compared magnetoencephalography (MEG) recordings between two groups of participants (n = 16 per group) exposed to different exemplar images of the same object concepts. Further, we disentangled low-level from high-level MEG responses by estimating the unique and shared contribution of models of behavioral judgments, semantics, and different layers of deep neural networks of visual object processing. We find that 1) both generalization across exemplars as well as generalization of object-related signals across time increase after 150 ms, peaking around 230 ms; 2) representations specific to behavioral judgments emerged rapidly, peaking around 160 ms. Collectively, these results suggest a lower bound for the emergence of conceptual object representations around 150 ms following stimulus onset.

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Language(s): eng - English
 Dates: 2018-05-102017-11-222018-05-142018-05-182018-09
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.neuroimage.2018.05.037
PMID: 29777825
Other: Epub 2018
 Degree: -

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Project name : -
Grant ID : ZIA-MH-002909
Funding program : Intramural Research Program
Funding organization : National Institute of Mental Health (NIMH)
Project name : -
Grant ID : 93-M-0170
Funding program : Clinical Study Protocol
Funding organization : National Institute of Mental Health (NIMH)
Project name : -
Grant ID : -
Funding program : Feodor-Lynen Fellowship
Funding organization : Alexander von Humboldt Foundation
Project name : -
Grant ID : -
Funding program : Rubicon Fellowship
Funding organization : Netherlands Organisation for Scientific Research (NWO)

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Title: NeuroImage
Source Genre: Journal
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Publ. Info: Orlando, FL : Academic Press
Pages: - Volume / Issue: 178 Sequence Number: - Start / End Page: 172 - 182 Identifier: ISSN: 1053-8119
CoNE: https://pure.mpg.de/cone/journals/resource/954922650166