In the article titled "First-Episode Schizophrenic Psychosis Differs From First-Episode Affective Psychosis and Controls in P300 Amplitude Over Left Temporal Lobe," published in the February 1998 issue of the ARCHIVES (Arch Gen Psychiatry. 1998;55:173-180), the reported value for the P (1-way ANOVA) for the age characteristic given in Table 2 on page 175 is incorrect. The correct P value for the age characteristic is .066.