Speed of processing in children with specific language impairment

Area of Science:

• Developmental Psychology
• Linguistics
• Cognitive Neuroscience

Background:

• Specific Language Impairment (SLI) affects language development in children.
• Understanding processing speed is crucial for diagnosing and supporting children with SLI.
• Previous research suggests potential links between SLI and slower cognitive processing.

Purpose of the Study:

• To investigate the response times of children with SLI across a variety of tasks.
• To compare the processing speed of children with SLI to children with normal language development (NLD).
• To examine if processing speed deficits are consistent across linguistic and nonlinguistic tasks.

Main Methods:

• Seventy-seven third-grade children participated, including groups with SLI (n=29), NLD (n=29), and nonspecific language impairment (NLI, n=19).
• Participants completed 10 different tasks, encompassing 41 conditions, comprising both linguistic and nonlinguistic activities.
• Mean response times (RTs) were analyzed using regression models to compare groups.

Main Results:

• Children with SLI consistently exhibited slower mean response times compared to children with NLD across all task conditions.
• This slowing effect was evident in both separate analyses of linguistic and nonlinguistic tasks.
• Children with NLI also showed slower RTs, with a more pronounced degree of slowing than the SLI group.

Conclusions:

• The findings support the hypothesis that children with SLI generally have slower processing speeds than their typically developing peers.
• The deficit in processing speed appears to be a general characteristic, affecting both language and non-language tasks.
• However, the study acknowledges that not all children with SLI demonstrate this specific processing speed deficit.