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Processing Speed Deficit and Its Relationship with Math Fluency in Children with Attention-Deficit/Hyperactivity
1Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
Journal of Attention Disorders
|November 20, 2023
Summary
Children with Attention-Deficit/Hyperactivity Disorder (ADHD) exhibit a general processing speed (PS) deficit. This deficit, particularly in cognitive PS, directly and indirectly impacts math fluency (MF) through working memory (WM).
Area of Science:
- Neuroscience
- Developmental Psychology
- Cognitive Psychology
Background:
- Attention-Deficit/Hyperactivity Disorder (ADHD) is associated with various cognitive impairments.
- Processing speed (PS) and working memory (WM) are crucial for academic performance, particularly in mathematics.
- Understanding the specific cognitive deficits in ADHD is essential for targeted interventions.
Purpose of the Study:
- To quantify the processing speed (PS) deficit in children diagnosed with ADHD.
- To examine the role of PS deficits as a primary cause of daily dysfunction in ADHD.
- To investigate the direct and indirect pathways of PS on math fluency (MF) through working memory (WM).
Main Methods:
- A cohort of 78 children, including 52 with ADHD and 26 controls, were recruited.
- Participants underwent assessments of motor, perceptual, cognitive, and verbal processing speed (PS).
- Working memory (WM) and math fluency (MF) were also evaluated in all participants.
Main Results:
- Children with ADHD demonstrated significantly lower performance across all measured PS domains compared to controls, indicating a general PS deficit.
- Cognitive PS emerged as a significant predictor of math fluency (MF).
- Mediation analysis revealed that cognitive PS directly and indirectly influenced MF via WM, suggesting PS as a potential primary driver of MF difficulties.
Conclusions:
- The study confirms a pervasive processing speed (PS) deficit in children with ADHD.
- Given the significant impact of PS on math fluency (MF), interventions for children struggling with MF should incorporate PS assessment and training.
- Addressing PS deficits may be a key strategy to improve academic outcomes in children with ADHD.
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