A key function of emotion is the preparation for action. Recent studies have shown emotional facilitation of sensory processing in the visual cortex and the late positive component of the event-related-potential (ERP) is enhanced for emotional stimuli. The present study also use event-related potential (ERP) to test whether developmental differences in brain cortical reactivity to emotional stimuli. ERPs were recorded from 48 students with three age stages (13-14years,16-17years,19-20years of age ) . The pa...