Processing limitations in children with specific language impairment: the role of executive function
Nancie Im-Bolter1, Janice Johnson, Juan Pascual-Leone
1Department of Psychology, Trent University, Otonabee College, Peterborough, ON, Canada K9J 7B8. nimbolter@trentu.ca
Child Development
|November 17, 2006
Summary
Children with specific language impairment (SLI) show processing differences in mental attention and updating, but not shifting. Mental attention predicts language skills, partly through updating abilities.
Area of Science:
- Cognitive Psychology
- Developmental Psychology
- Linguistics
Background:
- Specific language impairment (SLI) is associated with processing limitations, but underlying mechanisms require clearer definition.
- Existing research lacks a theory-guided approach to investigate processing capacity deficits in SLI.
- The theory of constructive operators offers a framework to explore these limitations.
Purpose of the Study:
- To investigate the mechanisms of limited processing capacity in children with SLI using the theory of constructive operators.
- To examine mental attentional capacity, mental attentional interruption, and executive functions (shifting, updating) in children with SLI.
Main Methods:
- A cohort of 45 children with SLI and 45 typically developing children, aged 7-12 years, participated.
- Performance was assessed on measures of mental attention, interruption, shifting, and updating.
- Statistical analyses were employed to compare group performances and explore relationships between variables.
Main Results:
- Significant group differences were observed in mental attention, interruption, and updating.
- No significant differences were found in the shifting executive function between the groups.
- Mental attention was found to predict language competence, with updating partially mediating this relationship.
Conclusions:
- The findings support the role of specific cognitive processes, particularly mental attention and updating, in SLI.
- These results highlight the importance of a theory-guided approach in understanding SLI.
- The partial mediation by updating suggests a complex interplay between cognitive functions and language competence in SLI.
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