The brain has an extremely complex neural network structure. The functional integration and functional separation of neurons in different brain regions are the neural basis of brain information processing (Tononi, Sporns, & Edelman, 1994). In power analysis, children with ASD showed significantly increased power value in frontal region in the delta band. Our present study represented abnormal connectivity patterns in children with ASD. The coherence analysis of four frequency bands (delta, theta, alpha, and beta) found that the coherence of short‐distance connection and long‐distance connection in children with ASD was higher, compared with healthy children. Furthermore, correlation analysis shows that the abnormal EEG coherence was associated with clinical scale scores, further demonstrating the robustness of our findings.
