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Grand averages of event-related potentials (ERPs) elicited by a facial discrimination task in Mexican American young adults. Averages are presented for frontal (Fz) and central (Cz) and parietal (Pz) leads as elicited by each of the three types of facial expressions (happy, neutral, sad). The P450 component is indicated; solid lines are for male participants and dashed lines for females.
