Arousal In School Children With Attention Deficit Disorder And(or) Develomental Dyslexia During Reaction Time Distribution

Attention Deficit Disorder is quite common psychological development disease in school-age children that ADD is broadly defined as a mental disorder that may last a lifetime. Therefore clear ADD children cognitive impairment mechanism obstacle either from perspective of disease diagnosis and intervention or from the point of view of theoretical research, is of great importance. In addition, the causes of ADD and Developmental Dyslexia high comorbidity rate has been ADD-related comorbidity research focus. Understanding the comorbidity mechanism contribute to classify different disorders in order to make more targeted and specific treatment methods. This article will focus on subject’s reaction time variability in different arousal experiment task in order to assess the response of individual reaction time variation. This can help us to understand the condition of reaction time distribution of children in neuropsychological task. Furthermore, this research use Ex-Gaussian distribution to fit the subjects’reaction time distribution to better understand sustained attention of disabled children.The subjects of this research choose fourth-grade students in Shanghai. Through questionnaires and standardized psychological assessment, we finally screen 30 normal children,29 ADD children(including 16 dyslexia and ADD comorbidity children and 13 simple ADD children),and 13 simple dyslexia children. Implementing the continuous performance task and sustained attention response task to control group and disorder group. To adjust the awaken degree of neuropsychological tasks, we investigate the subject’s reaction time distribution. In addition, we use daily attention test to investigate the subject’s attention dimension.Results indicated:(1) ADD children have worse sustained attention ability compared to normal children. They have higher reaction time variability and worse accuracy in sustained attention. (2) With the reduction of arousal degree of sustained task, ADD children have more long abnormal reaction time compared to normal children. The reaction time distribution of ADD children is more susceptible than normal children. (3) Multiple regression analysis show that selective attention ability and sustained attention ability are likely to predict the Tau indicators in Ex-Gaussian distribution. (4) There was no significant difference in reaction time distribution and abnormal long reaction time distribution between Dyslexia children and normal children. The false positive error rate of Dyslexia children, comorbidity children and ADD children are significantly higher than normal children.