Interactive Effects of Executive Function and Language Ability on Children's Cross-Situational Word Learning

Area of Science:

• Child Development
• Cognitive Psychology
• Linguistics

Background:

• Cross-situational word learning (CSWL) is crucial for language acquisition.
• Executive functions (EF) are vital cognitive processes supporting learning and behavior regulation.
• Understanding the interplay between EF and language is essential for explaining individual differences in word learning.

Purpose of the Study:

• To investigate if executive function (EF) skills predict cross-situational word learning (CSWL) in children.
• To determine if language ability moderates the relationship between EF and CSWL.
• To examine these relationships in children with and without developmental language disorder (DLD).

Main Methods:

• Fifty children aged 5-9 years participated.
• A CSWL task was used to assess novel word learning.
• EF was measured using the dimensional change card sort task, assessing shifting, inhibitory control, and monitoring.

Main Results:

• EF skills, particularly shifting and monitoring, predicted CSWL, but only in children with average-to-high language skills.
• Weaker EF skills diminished the positive impact of strong language abilities on word learning.
• EF explained minimal variance in CSWL for children with weaker language skills, including those with DLD.
• Inhibitory control showed minimal impact on CSWL across language profiles.

Conclusions:

• CSWL depends on the dynamic interaction between executive control and language ability.
• Word learning difficulties in children may not solely stem from deficits in language or EF.
• Language acquisition models should integrate EF-language interactions, especially for atypical language profiles.