Does Inattention and Hyperactivity Moderate the Relation Between Speed of Processing and Language Skills?

Area of Science:

• Neurodevelopmental Disorders
• Child Psychology
• Linguistic Development

Background:

• The precise role of speed of processing (SOP) in developmental language disorder (DLD) remains debated, as SOP is also linked to other neurodevelopmental conditions like attention-deficit/hyperactivity disorder.
• Understanding the interplay between SOP, language skills, and attention is crucial for identifying underlying mechanisms in DLD.

Purpose of the Study:

• To investigate the longitudinal associations between speed of processing (SOP), language abilities, and symptoms of inattention/hyperactivity in a UK child cohort.
• To determine if inattention/hyperactivity moderates the relationship between SOP and language development over time.

Main Methods:

• A longitudinal study of 528 UK children from diverse socioeconomic backgrounds, assessed at ages 5-6 and 7-8 years.
• Utilized assessments of speed of processing, language skills, and parent/teacher ratings of inattention and hyperactivity.

Main Results:

• Children with DLD consistently exhibited weaknesses in SOP.
• Persistent SOP deficits did not longitudinally predict language outcomes independently.
• Inattention/hyperactivity ratings significantly moderated the SOP-language association, indicating SOP deficits are more detrimental to language when attention/hyperactivity issues are present.

Conclusions:

• Speed of processing may be a shared risk factor for developmental language disorder and attention/hyperactivity issues, or a general indicator of neurodevelopmental challenges.
• The findings highlight the complex interaction between cognitive processing, language, and attention in child neurodevelopment.
• Targeting interventions that address both SOP and attention/hyperactivity may be beneficial for children with DLD.