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  Two approaches to repetition suppression

Noppeney, U., & Penny, W. (2006). Two approaches to repetition suppression. Human Brain Mapping, 27(5), 411-416. doi:10.1002/hbm.20242.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-D27B-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-9605-D
Genre: Journal Article

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Noppeney, U1, 2, Author              
Penny, WD, Author
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1Research Group Cognitive Neuroimaging, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497804              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Repetition suppression refers to the phenomenon that prior processing of stimuli (or stimulus attributes) decreases activation elicited by processing subsequent stimuli with identical attributes. We present two complementary approaches to identify regions that show repetition suppression for subsequent sentences with either identical: (1) sentence forms or (2) speakers. The first categorical approach simply compares sentences that are presented in Same and Different blocks. The second factorial approach operationally defines repetition suppression as decreased activation for the subsequent Same stimulus relative to its preceding sentence. To account for nonspecific time confounds, this approach tests for a repetition × condition (Same or Different) interaction. Surprisingly, the two approaches revealed different results: Only the categorical analysis detected sentence repetition effects in multiple regions within a bilateral frontotemporal system that has previously been implicated in sentence processing. Th ese discrepancies might be due to the different efficiencies with which the particular contrasts were estimated or spurious differences in stimuli or attentional set that could not be entirely controlled within a single subject. Finally, we combined the two approaches in a [global null] conjunction analysis.

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 Dates: 2006-03
 Publication Status: Published in print
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 Identifiers: DOI: 10.1002/hbm.20242
BibTex Citekey: 3839
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Title: Human Brain Mapping
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 27 (5) Sequence Number: - Start / End Page: 411 - 416 Identifier: ISSN: 1065-9471
CoNE: https://pure.mpg.de/cone/journals/resource/954925601686