La mémoire verbale à court terme : un simple produit des interactions entre systèmes langagiers, attentionnels et de traitement de l’ordre sériel ?

A Preliminary Examination of the Impact of Working Memory Training on Syntax and Processing Speed in Children with ASD

In addition to deficits in pragmatics, children with autism spectrum disorders (ASD) have weaknesses in complex syntax and working memory (WM). These two deficits may be closely related. Previous work investigated the effects of WM training in developmental language disorders and showed significant improvement in both WM and syntax. The current study tests the impact of 12 h of WM training across 8 weeks in 30 children with ASD, aged 5 to 11. Results showed direct improvements on untrained WM tasks, as well as transfer effects to syntax and processing speed. Stronger WM led to better syntactic abilities. While they must be replicated, these exciting results provide impetus for further studies of WM interventions.

Relationship between working memory and complex syntax in children with Developmental Language Disorder

Some theories of Developmental Language Disorder (DLD) explain the linguistic deficits observed in terms of limitations in non-linguistic cognitive systems such as working memory. The goal of this research is to clarify the relationship between working memory and the processing of complex sentences by exploring the performance of 28 French-speaking children with DLD aged five to fourteen years and 48 typically developing children of the same age in memory and linguistic tasks. We identified predictive relationships between working memory and the comprehension and repetition of complex sentences in both groups. As for syntactic measures in spontaneous language, it is the complex spans that explain the major part of the variance in the control children. In children with DLD, however, simple spans are predictive of these syntactic measures. Our results thus reveal a robust relationship between working memory and syntactic complexity, with clinical implications for the treatment of children with DLD.

Syntax and working memory in typically-developing children

A growing trend in developmental psycholinguistics is to relate linguistic development to the development of other cognitive systems. Jakubowicz (2005, 2011) in particular argued that the processing of a complex sentence requires considerable working memory (WM) resources and that these resources are limited in young children, which would explain their non-adult grammar. The present research aims to clarify the relationship between WM and complex syntax, in comprehension, repetition, and spontaneous production, in 48 typically-developing children aged 5 to 12. Our results demonstrate a strong age effect for all measures of WM and syntax. They also reveal strong correlations between scores on simple and complex spans and syntactic performance. Finally, we show the highly predictive value of WM capacities on the acquisition of syntactic skills in both comprehension and production. In particular, the complex-span task, measuring counting span, explains the largest part of the variance in the spontaneous production of embedded clauses.

The semantic-similarity effect in children: influence of long-term knowledge on verbal short-term memory

The present research was designed to highlight the relation between children's categorical knowledge and their verbal short-term memory (STM) performance. To do this, we manipulated the categorical organization of the words composing lists to be memorized by 5- and 9-year-old children. Three types of word list were drawn up: semantically similar context-dependent (CD) lists, semantically similar context-independent (CI) lists, and semantically dissimilar lists. In line with the procedure used by Poirier and Saint-Aubin (1995), the dissimilar lists were produced using words from the semantically similar lists. Both 5- and 9-year-old children showed better recall for the semantically similar CD lists than they did for the unrelated lists. In the semantic similar CI condition, semantic similarity enhanced immediate serial recall only at age 9 but contributed to item information memory both at ages 5 and 9. These results, which indicate a semantic influence of long-term memory (LTM) on serial recall from age 5, are discussed in the light of current models of STM. Moreover, we suggest that differences between results at 5 and 9 years are compatible with pluralist models of development.