Fig. 1From: Caregiver-child interaction as an effective tool for identifying autism spectrum disorder: evidence from EEG analysisStudy flowchart. (A) All participants engaged in a 3–5 min free play session face-to-face with their caregiver, while simultaneously collecting video and EEG signals. (B) After offline coding of the interaction video and preprocessing of EEG data, indicators were calculated and statistical analysis was performed. (C) After preprocessing the EEG data, PSD (power spectral density) values were obtained through FFT transformation in theta and alpha bandsBack to article page