ERP data were collected at approximately annual intervals during childhood and biennially during young adulthood (ages 19 and greater) for third generation offspring at high or low familial risk for developing alcohol dependence. Amplitude of the P300 component (at the midline parietal location [Pz electrode]) of the ERP wave was available for 496 subjects with at least one P300 recording obtained during the 8– 29 age span representing 2774 separate ERP recordings. The present analysis focused on 455 subjects with at least two recordings between 8–29 years. Data were analyzed using subsets by age range (8–12, 13–18, and 19–29). A total of 424 subjects provided data that included at least two recordings within an age range.
