注意缺陷多动障碍儿童在不同加工阶段的干扰控制

采用刺激－刺激和刺激－反应相容性任务范式，将信息加工在知觉和反应阶段的冲突效应分离开来，考察注意缺陷多动障碍（Attention Deficit Hyperactivity Disorder，简称ADHD）儿童在知觉和反应阶段冲突控制的模式和时间轨迹。结果发现，在反应阶段，ADHD儿童的干扰控制能力明显弱于正常对照组儿童，混合型ADHD儿童的能力更弱于注意缺陷型ADHD儿童；在知觉阶段，ADHD儿童没有明显的干扰抑制缺损，两组ADHD儿童（注意缺陷型和混合型）的表现模式相似；儿童抑制冲突干扰所遵循的时间轨迹在知觉和反应阶段有所不同：与知觉阶段相比，反应阶段需要更长的时间才能抑制冲突干扰。但ADHD儿童和正常儿童之间的表现模式相似

Conflict Control at Different Periods of Processing in Children with Two Subtypes of ADHD

A stimulus-stimulus and stimulus-response compatibility task was used to investigate to what extent ADHD children had deficits in conflict control at periods of perceptual processing and response activation,and whether they resolved conflicts in similar time courses as normal children.Subjects were two subtypes of ADHD children(25 predominantly inattentive and 30 combined) and normal controls who were matched in age,IQ and the year of education.Results showed that ADHD children had great difficulties(even more sever showed the combined comparing with predominantly inattentive) in resolving conflict at period of response while they showed a normal pattern as controls in controlling conflict at period of perception.Moreover,for both ADHD and normal children,resolution of conflicts at period of perceptual and response had different time courses,with more time needed for the resolution of response conflict.