Dykman R A, Holcomb P J, Oglesby D M, Ackerman P T
Biol Psychiatry. 1982 Jun;17(6):675-85.
Ten boys in each of four groups (hyperactive, learning-disabled, hyperactive/learning-disabled or mixed, and normal) were exposed to a complex visual search task. EEGs were recorded at central and parietal sites, 1-sec prestimulus and 1-sec poststimulus onset, on three types of trials. The resulting wave forms, averaged over trials, were converted to the frequency domain via a fast Fourier transform and factored by principal components. Four components accounting for 87% of the variance were varimax-rotated. Analyses of variance of the component scores revealed that Component 1 differentiated the four groups of boys. This component had highest loadings in frequencies from 16 to 20 Hz and secondary loading in frequencies from 7 to 10 Hz. It was concluded that this multifrequency component is sensitive to parameters deficient in hyperactive and learning-disabled children.
四个组（多动组、学习障碍组、多动/学习障碍混合组和正常组）每组10名男孩参与了一项复杂的视觉搜索任务。在三种类型的试验中，于中央和顶叶部位记录脑电图，记录刺激前1秒和刺激开始后1秒。通过快速傅里叶变换将试验平均得到的波形转换到频域，并通过主成分进行分解。占方差87%的四个成分进行了方差最大化旋转。成分得分的方差分析表明，成分1区分了四组男孩。该成分在16至20赫兹频率上具有最高负荷，在7至10赫兹频率上具有次要负荷。得出的结论是，这种多频成分对多动和学习障碍儿童所缺乏的参数敏感。
