Response time in 14-year-olds with language impairment

Area of Science:

• Developmental psychology
• Neuroscience
• Speech and language pathology

Background:

• Language impairment affects a significant portion of children.
• Understanding the cognitive underpinnings of language impairment is crucial for effective intervention.
• Response time (RT) is a key indicator of processing speed.

Purpose of the Study:

• To investigate if children with language impairment exhibit slower response times (RT) at age 14 compared to typically developing peers.
• To determine if processing speed differences are consistent across motor, nonverbal cognitive, and language tasks.
• To examine the relationship between early (age 9) and later (age 14) RT performance in children with language impairment.

Main Methods:

• A longitudinal study involving 14-year-old children with specific language impairment (SLI), nonspecific language impairment (NLI), and typical development (NLD).
• Participants completed linguistic and nonlinguistic speeded tasks at ages 9 and 14.
• Response times (RT) were analyzed across different task domains.

Main Results:

• Both SLI and NLI groups demonstrated significantly slower RTs than the NLD group across motor, nonverbal cognitive, and language domains.
• No significant differences in the degree of slowing were observed among the task domains.
• RT performance at age 9 was moderately correlated with performance at age 14, indicating persistence of processing speed differences.

Conclusions:

• Slow response time appears to be a persistent characteristic in a majority of children with language impairment.
• The precise relationship between processing speed and language abilities warrants further research.
• These findings highlight the importance of considering processing speed in the assessment and support of children with language difficulties.