Processing limitations in children with specific language impairment: the role of executive function

Research suggests that children with specific language impairment (SLI) have processing limitations; however, the mechanisms involved have not been well defined or investigated in a theory-guided manner. The theory of constructive operators was used as a framework to explore processes underlying limited processing capacity in children with SLI. Mental attentional capacity, mental attentional interruption, and 2 specific executive functions (shifting and updating) were examined in 45 children with SLI and 45 children with normally developing language, aged 7 to 12 years. The results revealed overall group differences in performance on measures of mental attention, interruption, and updating, but not shifting. The findings supported the premise that mental attention predicted language competence, but that this relationship was mediated partially by updating.     

Development of mental attention in gifted and mainstream children: the role of mental capacity, inhibition, and speed of processing

The study examined performance of 6- to 11-year-old children, from gifted and mainstream academic programs, on measures of mental-attentional capacity, cognitive inhibition, and speed of processing. In comparison with mainstream peers, gifted children scored higher on measures of mental-attentional capacity, responded more quickly on speeded tasks of varying complexity, and were better able to resist interference in tasks requiring effortful inhibition. There was no group difference on a task requiring automatic inhibition. Comparisons between older and younger children yielded similar results. Correlations between inhibition tasks suggest that inhibition is multidimensional in nature, and its application may be affected by task demands. Measures of efficiency of inhibition and speed of processing did not explain age or group differences on a complex intellective measure of mental-attentional capacity.     

Theory of Mind and Language in Childhood Epilepsy

We examined theory of mind (ToM; mental state understanding) and language in children with epilepsy (EP; n = 10; mean age = 9.92, SD = 2.34) and with typical development (TD; n = 20; mean age = 10.05, SD = 2.08). The EP group demonstrated worse ToM compared to the TD group (t(28) = ?1.11, p = .28, d = .44) but differences did not persist when controlling for language. Syntactic language was correlated with ToM in the EP group (rho (10) = .79, p < .01). This study confirms language is important for ToM in a group of children with a neurological disorder and indicates that children with epilepsy are at risk for difficulties in understanding the mental states of others due to their language deficits. This may help to explain the social difficulties these children have with their peers.