The Language-Cognition Interface in Atypical Development: Support for an Integrative Approach

Area of Science:

• Cognitive Science
• Developmental Psychology
• Linguistics

Background:

• Complex syntax mastery is linked to general cognitive abilities like working memory (WM) and attention in children.
• This link fuels debate on whether language impairments stem from specific language systems or general cognitive deficits.
• The parallel combination approach (PCA) proposes a hybrid model, integrating both domain-specific and domain-general processes in language development.

Purpose of the Study:

• To examine the validity of the parallel combination approach (PCA) in understanding the language-cognition interface.
• To investigate the relationship between working memory, attention, and syntax in children with specific learning difficulties, ADHD, and DLD.
• To explore the clinical relevance of the PCA in diagnosing and understanding language impairments.

Main Methods:

• Review of five studies: two cross-sectional, one priming, and two training studies.
• Investigated the language-cognition interface in children with specific learning difficulties, ADHD, and DLD.
• Included a novel WM training program to assess its impact on syntactic improvements.

Main Results:

• Findings confirm a strong link between WM, attention, and syntax, supporting domain-general theories.
• Identified instances where impaired general skills co-occur with intact syntax, supporting domain-specific theories.
• Results align with PCA predictions, demonstrating that both domain-general and domain-specific factors contribute to language development.

Conclusions:

• The PCA offers a framework to understand language-cognition links, accommodating seemingly contradictory findings.
• Clinical implications include tailored assessments for specific learning difficulties and ADHD, recognizing diverse cognitive profiles in DLD.
• A validated WM training program shows potential for improving syntactic skills in DLD.