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The interplay of heuristics and parsing routines in sentence comprehension: evidence from ERPs and reaction times.

Vissers CT, Chwilla DJ, Kolk HH

Institute for Cognition and Information, Radboud University, Nijmegen, The Netherlands. c.vissers@nici.ru.nl

Semantic anomalies like "the fox that hunted the poacher" elicit P600 effects. Kolk et al. [Kolk, H.J., Chwilla, D.J., Van Herten, M., Oor, P.J.W., 2003. Structure and limited capacity in verbal working memory: a study with event related potentials. Brain and language, 85(1), 1-36] proposed that this P600 effect is triggered by a conflict between the outcome of a lexical strategy with that of the parsing routine. Specifically, when the lexical strategy indicates that the poacher hunted the fox, the full parse leads to the conclusion that the fox was the one who did the hunting. We tested this hypothesis by replicating the study cited above but manipulating the context by means of instruction. Participants were informed that semantic anomalies were created on purpose and that they should not be misled by these anomalies but instead focus on syntax or sentence structure. This instruction led to a strong reduction in P600 effect. This result supports the view that expectations play an important role in the generation of P600 effects to semantic anomalies, as proposed by Kolk et al. [Kolk, H.J., Chwilla, D.J., Van Herten, M., Oor, P.J.W., 2003. Structure and limited capacity in verbal working memory: a study with event related potentials. Brain and language, 85(1), 1-36].

Published 19 March 2007 in Biol Psychol, 75(1): 8-18.
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