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Severity of AD/HD symptoms and efficiency of attentional resource allocation

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Title: Severity of AD/HD symptoms and efficiency of attentional resource allocation
Authors: Sawaki, Risa Browse this author
Katayama, Jun'ichi Browse this author
Keywords: AD/HD
Attentional resource allocation
Three-stimulus oddball paradigm
Issue Date: 16-Oct-2006
Publisher: Elsevier
Journal Title: Neuroscience Letters
Volume: 407
Issue: 1
Start Page: 86
End Page: 90
Publisher DOI: 10.1016/j.neulet.2006.08.006
PMID: 16949203
Abstract: This study investigated the mechanism that underlies the inefficient allocation of attentional resources in Attention-Deficit/Hyperactivity Disorder (AD/HD). The P300 event-related brain potential (ERP) was elicited from 24 healthy adults using a visual three-stimulus oddball paradigm (standard, 70%; target, 15%; non-target, 15%) and the degree of their AD/HD symptoms was assessed by using AD/HD symptom scales. Target stimulus was a circle and standard stimulus was an “X”. Two task conditions were defined according to the non-target stimulus type (typical or novel): a triangle for the typical condition and colored non-repetitive novel stimuli for the novel condition. In both conditions, target and non-target elicited P300s. A ratio of non-target P300 to target P300 amplitude was used to assess the efficiency of attentional resource allocation; low ratio indicates the efficient allocation of attentional resource. The correlation analysis revealed a strong positive correlation between the AD/HD symptom score and the P300 amplitude ratio in the typical condition (r = .80), while only a weak positive correlation was observed in the novel condition (r = .23). The present study found that the commonality of task-relevant and task-irrelevant information, rather than the stimulus novelty of task-irrelevant information, induces the inefficient allocation of attentional resources in AD/HD.
Type: article (author version)
Appears in Collections:教育学院・教育学研究院 (Graduate School of Education / Faculty of Education) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 片山 順一

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