A Neurocomputational Model of the N400 and the P600 in Language Processing

Autor/inn/en	Brouwer, Harm; Crocker, Matthew W.; Venhuizen, Noortje J.; Hoeks, John C. J.
Titel	A Neurocomputational Model of the N400 and the P600 in Language Processing
Quelle	In: Cognitive Science, 41 (2017), S.1318-1352 (35 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0364-0213
DOI	10.1111/cogs.12461
Schlagwörter	Diagnostic Tests; Brain Hemisphere Functions; Language Processing; Semantics; Syntax; Models; Memory; Computational Linguistics; Simulation + Suchen Sie Ihr Suchwort? Diagnostic test; Diagnostischer Test; Sprachverarbeitung; Semantik; Analogiemodell; Gedächtnis; Linguistics; Computerlinguistik; Simulation program; Simulationsprogramm
Abstract	Ten years ago, researchers using event-related brain potentials (ERPs) to study language comprehension were puzzled by what looked like a "Semantic Illusion": Semantically anomalous, but structurally well-formed sentences did not affect the N400 component--traditionally taken to reflect semantic integration--but instead produced a P600 effect, which is generally linked to syntactic processing. This finding led to a considerable amount of debate, and a number of complex processing models have been proposed as an explanation. What these models have in common is that they postulate two or more separate processing streams, in order to reconcile the Semantic Illusion and other semantically induced P600 effects with the traditional interpretations of the N400 and the P600. Recently, however, these multi-stream models have been called into question, and a simpler single-stream model has been proposed. According to this alternative model, the N400 component reflects the retrieval of word meaning from semantic memory, and the P600 component indexes the integration of this meaning into the unfolding utterance interpretation. In the present paper, we provide support for this "Retrieval-Integration (RI)" account by instantiating it as a neurocomputational model. This neurocomputational model is the first to successfully simulate the N400 and P600 amplitude in language comprehension, and simulations with this model provide a proof of concept of the single-stream RI account of semantically induced patterns of N400 and P600 modulations. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01