Alcoholism has often been characterized as a reward deficit disorder (Koob, 2013; Forbes et al., 2014), and several studies have successfully used ERPs to examine reward processing in healthy individuals (Homberg et al., 1980, 1981; Begleiter et al., 1983; Ivanitsky et al., 1986; Gehring and Willoughby, 2002; Yeung and Sanfey, 2004; Hajcak et al., 2005; Nieuwenhuis et al., 2005; Toyomaki and Murohashi, 2005a, b; Hajcak et al., 2006; Holroyd et al., 2006; Yu and Zhou, 2006; Hajcak et al., 2007; Kamarajan et al., 2009), as well as in alcoholic and HR offspring (Porjesz et al., 1987; Ramsey and Finn, 1997; Fein and Chang, 2008; Kamarajan et al., 2010). Major ERP components studied during outcome/feedback processing during monetary gambling tasks (MGT) are the outcome-related negativity (ORN) or N2 (between 200 ms and 300 ms) and the outcome-related positivity (ORP) or P3 (between 300 ms and 600 ms) (Gehring and Willoughby, 2002; Yeung and Sanfey, 2004; Hajcak et al., 2005; Yeung et al., 2005; Hajcak et al., 2006; Holroyd et al., 2006; Cohen and Ranganath, 2007; Kamarajan et al., 2009). In our
