The relation between receptive grammar and procedural, declarative, and working memory in specific language...

Area of Science:

• Cognitive Psychology
• Developmental Psychology
• Neuroscience

Background:

• Specific language impairment (SLI) is often linked to memory deficits, but multiple memory systems are rarely studied simultaneously.
• Understanding memory's role in grammar acquisition is crucial for both typically developing (TD) children and those with SLI.

Purpose of the Study:

• To investigate how procedural, declarative, and working memory predict receptive grammar in children with SLI and TD children.
• To identify potential differences in memory system contributions to grammar between these two groups.
• To explore if memory abilities play a compensatory role in children with SLI.

Main Methods:

• Examined 45 primary school-aged children with SLI and 46 TD children (mean age 9;10).
• Utilized regression analyses to assess procedural, declarative, and working memory as predictors of receptive grammar.
• Simultaneously analyzed multiple memory systems to understand their combined predictive power.

Main Results:

• The overall model significantly predicted 51.6% of the variance in receptive grammar.
• Procedural memory learning predicted grammar in TD children but not in children with SLI.
• Declarative memory learning was a significant predictor of grammar exclusively in children with SLI.

Conclusions:

• Receptive grammar abilities are associated with different memory systems in children with SLI compared to TD children.
• Procedural memory is key for grammar in TD children, while declarative memory appears compensatory in children with SLI.
• This study is the first to show a significant interaction between group (SLI vs. TD) and memory system in predicting grammar.