Early visual word processing in children with ADHD: An ERP study
Wenfang Zhang1, Xin Liu2, Aiping Ni1
1CAS Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.
Insights
Children with attention-deficit/hyperactivity disorder (ADHD) show impaired early visual word processing, impacting reading development. This neural deficit correlates with orthographic skills and naming speed.
Area of Science:
- Neuroscience
- Developmental Psychology
- Cognitive Science
Background:
- Attention-deficit/hyperactivity disorder (ADHD) frequently co-occurs with reading disability (RD).
- Reading comprehension deficits in children with ADHD are known, but early visual word processing remains unclear.
Purpose of the Study:
- Investigate event-related potential (ERP) responses to visual stimuli in children with ADHD (aged 6-12).
- Focus on the N170 component, crucial for rapid, automatic visual word processing.
Main Methods:
- Utilized electroencephalography (EEG) to record ERPs in 20 children with ADHD and 20 typically developing (TD) children.
- Administered word reading and cognitive skills tests to assess reading-related abilities.
Main Results:
- Children with ADHD exhibited deficits in early neural specialization for Chinese characters.
- Reduced coarse-tuning effect in the right hemisphere and absent fine-tuning effect observed in the ADHD group.
- Early neural specialization deficits correlated with orthographic processing and rapid naming speed.
Conclusions:
- N170 findings suggest impaired early visual word processing in children with ADHD contributes to reading difficulties.
- Orthographic processing and rapid naming are vital for early visual word specialization in this population.
Background:
Attention-deficit/hyperactivity disorder (ADHD) and reading disability (RD) co-occur frequently. Although reading comprehension difficulties in children with ADHD have been well documented, early visual word processing remains unclear.
Aims:
This study investigated event-related potential (ERP) responses to visual stimuli in children with ADHD (6-12 years) by focusing on the N170 component, which signifies rapid, automatic, and specialized processing of visual words.
Procedures:
Twenty children with ADHD and twenty typically developing (TD) children matched for sex and age performed an EEG task and underwent several word reading and reading-related cognitive skills tests.
Results:
The results revealed deficits in early neural specialization for Chinese characters among children with ADHD. The coarse-tuning effect in the right hemisphere was less pronounced in children with ADHD compared to TD children, and a fine-tuning effect was absent among the ADHD group. Moreover, the early neural specialization for Chinese characters in children with ADHD correlated with orthographic processing ability and rapid naming speed.
Conclusions And Implications:
The N170 findings indicate deviant early processing of visual words in children with ADHD, suggesting their reading difficulties may stem from these impairments. Furthermore, orthographic processing and rapid naming may play a vital role in the early specialization for Chinese characters among children with ADHD.
More Related Videos
08:17A Semantic Priming Event-related Potential ERP Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder
Published on: April 12, 2018
13:09Using Brain Activation nir-HEG/Q-EEG and Execution Measures CPTs in a ADHD Assessment Protocol
Published on: April 1, 2018
