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Dive into the research topics where Marie-Anne Schelstraete is active.

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Featured researches published by Marie-Anne Schelstraete.


Journal of Communication Disorders | 2011

Lexico-semantic processing in children with specific language impairment: The overactivation hypothesis

Fabrizio Pizzioli; Marie-Anne Schelstraete

UNLABELLED The hypothesis indicating an overactivation of the lexico-semantic network in children with specific language impairment (SLI) was tested using an auditory pair-primed paradigm (PPP), where participants made a lexical-decision on the second word of a noun pair that could be semantically related, or not, to the first one. Though children with SLI were proven to be as accurate as children matched for receptive vocabulary age, they presented a larger priming effect in the PPP in terms of both reaction time and accuracy. These results preliminarily support the hypothesis of an overactivation of the lexico-semantic network. LEARNING OUTCOMES As a result of reading this paper the reader will be able to (1) understand how the pair-primed paradigm can contribute to investigate the online spreading of the activation within the lexico-semantic network; (2) be aware of the fact that during development it is unlikely that some cognitive domain are completely typical (residual normality), while others develop atypically; (3) the reader will be aware that children with SLI present some subtle abnormalities in the lexico-semantic network, which appears to be overactive.


Journal of Cognitive Neuroscience | 2008

The speed of orthographic processing during lexical decision: Electrophysiological evidence for independent coding of letter identity and letter position in visual word recognition

Marina Mariol; Corentin Jacques; Marie-Anne Schelstraete; Bruno Rossion

Adults can decide rapidly if a string of letters is a word or not. However, the exact time course of this discrimination is still an open question. Here we sought to track the time course of this discrimination and to determine how orthographic informationletter position and letter identityis computed during reading. We used a go/no-go lexical decision task while recording event-related potentials (ERPs). Subjects were presented with single words (go trials) and pseudowords (no-go trials), which varied in orthographic conformation, presenting either a double consonant frequently doubled (i.e., ss) or never doubled (i.e., zz) (identity factor); and a position of the double consonant was which either legal or illegal (position factor), in a 2 2 factorial design. Words and pseudowords clearly differed as early as 230 msec. At this latency, ERP waveforms were modulated both by the identity and by the position of letters: The fronto-central no-go N2 was the smallest in amplitude and peaked the earliest to pseudowords presenting both an illegal double-letter position and an identity never encountered. At this stage, the two factors showed additive effects, suggesting an independent coding. The factors of identity and position of double letters interacted much later in the process, at the P3 level, around 300400 msec on frontal and central sites, in line with the lexical decision data obtained in the behavioral study. Overall, these results show that the speed of lexical decision may depend on orthographic information coded independently by the identity and position of letters in a word.


Cognitive Neuroscience | 2014

Early activation of Broca’s area in grammar processing as revealed by the syntactic mismatch negativity and distributed source analysis

Jeff Hanna; Sandrine Mejias Vanslype; Marie-Anne Schelstraete; Friedemann Pulvermüller; Yury Shtyrov; Heather K. J. van der Lely

Though activation of Broca’s region in the combinatorial processing of symbols (language, music) has been revealed by neurometabolic studies, most previous neurophysiological research found the earliest grammar indices in the temporal cortex, with inferior-frontal generators becoming active at relatively late stages. We use the attention- and task-free syntactic mismatch negativity (sMMN) event-related potential (ERP) to measure rapid and automatic sensitivity of the human brain to grammatical information in participants’ native language (French). Further, sources underlying the MMN were estimated by applying the Parametrical Empirical Bayesian (PEB) approach, with the Multiple Sparse Priors (MSP) technique. Results showed reliable grammar-related activation focused on Broca’s region already in the 150–190 ms time window, providing robust documentation of its involvement in the first stages of syntactic processing.


Infants and Young Children | 2015

Enhancing the Communication Abilities of Preschoolers at Risk for Behavior Problems: Effectiveness of a Parent-Implemented Language Intervention.

Elise Brassart; Marie-Anne Schelstraete

Communication deficits are frequently associated with externalizing behavior problems in preschoolers but, in most cases, unsuspected in clinical practice. This exploratory study evaluated the effectiveness of a relatively brief parent-implemented language intervention on preschoolers at risk for behavior problems. Participants were randomly allocated either to an experimental group (n = 16) or to an untreated control group (n = 16). An intervention of eight group sessions, aiming at enhancing parent verbal responsiveness and communication strategies, was implemented over 2 months. Results showed that this intervention created several improvements such as an enhancement of parental responsiveness and a trend toward increased child referential communication abilities and decreased child behavior problems. These effects persisted 6 months after the intervention. Despite some limitations and the need for a replication of these results, the findings highlight the importance of preventive interventions on parent–child communication and interactions in supporting the communication needs of children with externalizing behavior difficulties.


Applied Psycholinguistics | 2013

Real-time sentence processing in children with specific language impairment : the contribution of lexicosemantic, syntactic, and world-knowledge information

Fabrizio Pizzioli; Marie-Anne Schelstraete

The present study investigated how lexicosemantic information, syntactic information, and world knowledge are integrated in the course of oral sentence processing in children with specific language impairment (SLI) as compared to children with typical language development. A primed lexical- decision task was used where participants had to make a lexical decision on the last word of a sentence. Thirty-nine children were tested: 13 children with SLI, 13 younger children matched on receptive vocabulary, and 13 age-matched children. We manipulated (a) the semantic fit between the target and the prime sentence, (b) the syntactic structure of the prime (syntactic vs. asyntactic), and (c) the lexical association between the target word and the prime. Despite being slower overall, children with SLI showed a significant priming effect. Syntactic information had a similar impact on thematic integration in control children and children with SLI, although the latter were more sensitive to lexicosemantic association and world knowledge than control groups. In addition, children with SLI appeared to use semantic information even when the sentence was asyntactic. The results suggest thematic integration problems in SLI: syntactic and semantic information contribute independently to the thematic structure but are not integrated to generate the emerging higher order representation.


Perceptual and Motor Skills | 1997

What does Daneman and Carpenter's reading span really measure?

Michel Hupet; Donatienne Desmette; Marie-Anne Schelstraete

Reading span was assessed in three conditions aiming at varying the processing demands of a reading task. In a Sentence Reading Condition, the participants read aloud lists of sentences and memorize the final word of each sentence as in the original task of Daneman and Carpenter. In two other conditions, each sentence was replaced either by a series of unrelated words (Word Reading Condition) or by a series of meaningless syllables (Syllable Reading Condition); in these two conditions, however, each series ended with the same test words as in the Sentence Reading Condition. There was no significant effect of the condition on the scores for reading span. It is concluded that the typically low scores on reading span are not so much due to the processing demands of the task as to the disruptive effects of the articulatory suppression which characterizes the original task.


Child & Family Behavior Therapy | 2016

Do Parenting Variables Have Specific or Widespread Impact on Parenting Covariates? The Effects of Manipulating Self-Efficacy or Verbal Responsiveness

Isabelle Roskam; Elise Brassart; Laurie Loop; Bénédicte Mouton; Marie-Anne Schelstraete

ABSTRACT This research aimed at determining to what extent manipulating a specific parenting variable, self-efficacy beliefs or verbal responsiveness, causes specific change in this variable alone, or conversely to what extent it causes widespread change that affects other parenting covariates—in particular behavioral and emotional responsiveness, positive affect irritability, support, and control. Two microtrials were used to achieve this goal. The 45 parents participating were randomly assigned to an 8-week waiting list followed by an 8-week intervention condition focusing on self-efficacy manipulation, or to an 8-week intervention condition focusing on verbal responsiveness manipulation. It can be concluded from the results that the two specific parenting variables under consideration had widespread effects on the six parenting behaviors, with the exception of control in the self-efficacy beliefs condition. The results are discussed for both empirical and clinical purposes.


Clinical Linguistics & Phonetics | 2007

Word-finding difficulties in French-speaking children with SLI: a case STUDY.

Anne Bragard; Marie-Anne Schelstraete

This study presents the case of a 9‐year‐old boy, Jeoffrey, with word‐finding difficulties. In an attempt to investigate the cause(s) of these difficulties, an in‐depth evaluation of his semantic and phonological skills was carried out, in which lexical and phonological variables such as age of acquisition or phonological complexity were controlled. Jeoffreys performance was compared to a child matched for age. Although Jeoffrey showed no apparent phonological deficit, our results revealed deficits in semantic processes. We argue that this boys word‐finding difficulties are the result of imprecise and unspecified semantic representations. Therefore, as this case demonstrates, it is essential to determine the origin(s) of childrens word‐finding difficulties, which could be different and specific for each child presenting such a lexical deficit.


Annee Psychologique | 2013

Développement langagier et troubles externalisés du comportement en période préscolaire : quelles relations?

Céline Van Schendel; Marie-Anne Schelstraete; Isabelle Roskam

Une litterature consequente met en evidence depuis pres de trente ans la cooccurrence de troubles langagiers et comportementaux chez les enfants. Toutefois, les donnees actuelles n’ont toujours pas permis de comprendre le sens de cette relation ni d’en cerner les determinants. Repondant a l’absence de travail de synthese concernant les troubles externalises du comportement chez l’enfant d’âge prescolaire, la presente revue de litterature propose un etat des lieux des connaissances actuelles et de leurs limites, detaillant les niveaux de langage affectes et les troubles externalises du comportement qui y sont associes. Un cadre conceptuel est egalement propose afin d’integrer dans cette relation l’influence de variables propres a l’enfant et a son environnement. Les implications pour la recherche future et la clinique sont discutees.


Clinical Linguistics & Phonetics | 2011

Children with specific language impairment : the effect of argument-structure complexity on auditory sentence comprehension

Fabrizio Pizzioli; Marie-Anne Schelstraete

Children with specific language impairment (SLI) demonstrate consistent comprehension problems. The present study investigated whether these problems are driven primarily by structural complexity or length. A picture-sentence matching task was presented to 30 children: (1) 10 children with SLI, (2) 10 comprehension-matched children with typical language development (TLD) and (3) 10 children with TLD matched for chronological age. Argument-structure complexity was manipulated independently of length, which was also independently varied. Results showed that argument-structure complexity had a greater influence on comprehension in children with SLI than in the comparison groups, with transitive sentences eliciting more errors than intransitive ones. This effect was not dependent on sentence length, which did not appear to affect the comprehension level. The results support the view that comprehension problems in children with SLI are principally related to the structural complexity of the sentence rather than the amount of material to be processed.

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Michel Hupet

Catholic University of Leuven

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Isabelle Roskam

Université catholique de Louvain

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Marie Van Reybroeck

Université catholique de Louvain

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Elise Brassart

Université catholique de Louvain

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Anne Bragard

Université catholique de Louvain

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Emilie Collette

Université catholique de Louvain

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Marie-Pascale Noël

National Fund for Scientific Research

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Lucie Macchi

Université catholique de Louvain

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