Duration mismatch negativity (dMMN) waveform at Fz and scatterplots of dMMN amplitudes for all subjects.

<p>A. Waveforms are presented for healthy controls (HC, blue line), at-risk mental state (ARMS, red line), first episode schizophrenia (FES, light green line) and chronic schizophrenia (CS, dark green line). B. Distribution of amplitudes are presented for healthy controls (HC, blue dots), ARMS (red dots), first episode schizophrenia (light green dots) and chronic schizophrenia (dark green dots). * p<0.05 and ** p<0.01, compared to each groups.