The present study pursues findings from earlier behavioral research with children showing the superior ability of bilinguals to make grammaticality judgments in the context of misleading semantic information. The advantage in this task was attributed to the greater executive control of bilinguals, but this impact on linguistic processing has not been demonstrated in adults. Here, we recorded eventrelated potentials in young adults who were either English monolinguals or bilinguals as they performed two different language judgment tasks. In the acceptability task, participants indicated whether or not the sentence contained an error in either grammar or meaning; in the grammaticality task, participants indicated only whether the sentence contained an error in grammar, in spite of possible conflicting information from meaning. In both groups, sentence violations generated N400 and P600 waves. In the acceptability task, bilinguals were less accurate than monolinguals, but in the grammaticality task which requires more executive control, bilingual and monolingual groups showed a comparable level of accuracy. Importantly, bilinguals generated smaller P600 amplitude and a more bilateral distribution of activation than monolinguals in the grammaticality task requiring more executive control. Our results show that bilinguals use their enhanced executive control for linguistic processing involving conflict in spite of no apparent advantage in linguistic processing under simpler conditions. Keywords ERP; language; Bilingualism; Control; Executive functions; Syntax; Semantic; N400; P600 Studying judgments of sentence acceptability is a commonly-used method for understanding elements of syntactic and semantic processing. In a number of studies, mostly investigating children, this technique has been used to reveal differences between monolingual and bilingual participants (Bialystok, 1986(Bialystok, , 1988. Language processing, however, must ultimately be explained in the context of the cognitive system with which it is interconnected. The purpose © 2010 Elsevier Ltd. All rights reserved.Corresponding author: Sylvain Moreno, Department of Psychology, York University, 4700 Keele st., Toronto, ON, Canada M3J 1P3, smoreno@yorku.ca. Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. of the present study was to examine the differences found in semantic and syntactic processing of sentences for monolingual and bilingual adults under conditions demanding different levels of executive control by investigating the neural correlates of these processes.
NIH Public AccessIn two studies, Gala...