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. 2019 Apr 15;10:223. doi: 10.3389/fpsyt.2019.00223

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Copyright © 2019 Hsieh, Lin, Chien, Hwang, Hwu, Liu and Liu

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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P50 ratios (S2 amplitude/S1 amplitude) (A), N100 differences (μV; S2 amplitude − S1 amplitude) (B), and mismatch negativity (MMN) at electrode Fz (C) of individual participants between groups. The horizontal lines indicate the mean values within control vs. patient group, while the patient group consists of ultra-high-risk (UHR; oval) and first-episode psychosis (FEP; X) subjects. For P50 and N100, a larger ratio (S2/S1) and a smaller difference (S1 − S2) indicate poorer sensory gating. For MMN, a larger (less negative) value indicates poor deviance detection.