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  What makes a discourse constraining? Comparing the effects of discourse message and scenario fit on the discourse-dependent N400 effect

Otten, M., & Van Berkum, J. J. A. (2007). What makes a discourse constraining? Comparing the effects of discourse message and scenario fit on the discourse-dependent N400 effect. Brain Research, 1153, 166-177. doi:10.1016/j.brainres.2007.03.058.

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Otten, Marte, Autor
Van Berkum, Jos J. A.1, 2, 3, Autor           
Affiliations:
1Neurobiology of Language Group, MPI for Psycholinguistics, Max Planck Society, Nijmegen, NL, ou_102880              
2The Neurobiology of Language, MPI for Psycholinguistics, Max Planck Society, ou_55232              
3Language in Action , MPI for Psycholinguistics, Max Planck Society, Nijmegen, NL, ou_55214              

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 Zusammenfassung: A discourse context provides a reader with a great deal of information that can provide constraints for further language processing, at several different levels. In this experiment we used event-related potentials (ERPs) to explore whether discourse-generated contextual constraints are based on the precise message of the discourse or, more `loosely', on the scenario suggested by one or more content words in the text. Participants read constraining stories whose precise message rendered a particular word highly predictable ("The manager thought that the board of directors should assemble to discuss the issue. He planned a...[meeting]") as well as non-constraining control stories that were only biasing in virtue of the scenario suggested by some of the words ("The manager thought that the board of directors need not assemble to discuss the issue. He planned a..."). Coherent words that were inconsistent with the message-level expectation raised in a constraining discourse (e.g., "session" instead of "meeting") elicited a classic centroparietal N400 effect. However, when the same words were only inconsistent with the scenario loosely suggested by earlier words in the text, they elicited a different negativity around 400 ms, with a more anterior, left-lateralized maximum. The fact that the discourse-dependent N400 effect cannot be reduced to scenario-mediated priming reveals that it reflects the rapid use of precise message-level constraints in comprehension. At the same time, the left-lateralized negativity in non-constraining stories suggests that, at least in the absence of strong message-level constraints, scenario-mediated priming does also rapidly affect comprehension.

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Sprache(n): eng - English
 Datum: 2007
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 322377
DOI: 10.1016/j.brainres.2007.03.058
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Titel: Brain Research
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 1153 Artikelnummer: - Start- / Endseite: 166 - 177 Identifikator: -