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  Prediction in the service of comprehension: Modulated early brain responses to omitted speech segments

Bendixen, A., Scharinger, M., Strauss, A., & Obleser, J. (2014). Prediction in the service of comprehension: Modulated early brain responses to omitted speech segments. Cortex, 53, 9-26. doi:10.1016/j.cortex.2014.01.001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-CFB5-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-7FEB-7
Genre: Journal Article

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 Creators:
Bendixen, Alexandra1, Author
Scharinger, Mathias2, 3, Author              
Strauss, Antje2, Author              
Obleser, Jonas2, Author              
Affiliations:
1Department of Psychology, University of Oldenburg, ou_persistent22              
2Max Planck Research Group Auditory Cognition, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_751545              
3Max Planck Institute for Empirical Aesthetics, Frankfurt, ou_persistent22              

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Free keywords: Predictive coding; Semantic expectation; Auditory processing; Omission mismatch negativity (MMN); Source localization
 Abstract: Speech signals are often compromised by disruptions originating from external (e.g., masking noise) or internal (e.g., inaccurate articulation) sources. Speech comprehension thus entails detecting and replacing missing information based on predictive and restorative neural mechanisms. The present study targets predictive mechanisms by investigating the influence of a speech segment's predictability on early, modality-specific electrophysiological responses to this segment's omission. Predictability was manipulated in simple physical terms in a single-word framework (Experiment 1) or in more complex semantic terms in a sentence framework (Experiment 2). In both experiments, final consonants of the German words Lachs ([laks], salmon) or Latz ([lats], bib) were occasionally omitted, resulting in the syllable La ([la], no semantic meaning), while brain responses were measured with multi-channel electroencephalography (EEG). In both experiments, the occasional presentation of the fragment La elicited a larger omission response when the final speech segment had been predictable. The omission response occurred ∼125–165 msec after the expected onset of the final segment and showed characteristics of the omission mismatch negativity (MMN), with generators in auditory cortical areas. Suggestive of a general auditory predictive mechanism at work, this main observation was robust against varying source of predictive information or attentional allocation, differing between the two experiments. Source localization further suggested the omission response enhancement by predictability to emerge from left superior temporal gyrus and left angular gyrus in both experiments, with additional experiment-specific contributions. These results are consistent with the existence of predictive coding mechanisms in the central auditory system, and suggestive of the general predictive properties of the auditory system to support spoken word recognition.

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Language(s): eng - English
 Dates: 2013-06-132012-12-072014-01-022014-01-152014-04
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.cortex.2014.01.001
PMID: 24561233
Other: Epub 2014
 Degree: -

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Title: Cortex
  Other : Cortex
Source Genre: Journal
 Creator(s):
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Publ. Info: -
Pages: - Volume / Issue: 53 Sequence Number: - Start / End Page: 9 - 26 Identifier: ISSN: 0010-9452
CoNE: https://pure.mpg.de/cone/journals/resource/954925393344