et al., 2013; Cyders et al., 2014). Taken together, these findings add support to the view that P3 amplitude, impulsivity, and externalizing disorders are etiologically related (Iacono et al., 2003; Iacono and McGue, 2006; Chen et al., 2007; Carlson et al., 2009; Gao and Raine, 2009; Young et al., 2009; Gilmore et al., 2010a; Lejuez et al., 2010). It is important to note that BIS score differences between HR and LR groups varied according to the age group and gender (Fig. 7). Among males, the younger age group showed more robust differences (p < 0.001) between LR and HR groups in non-planning, motor, cognitive and total scores, while the older males displayed a modest level of significance (p < 0.05) only in motor and total scores. While our finding on age and gender differences in impulsivity are similar to the findings in the literature (Steinberg et al., 2008; Stoltenberg et al., 2008), impulsivity as such may mediate the association between gender and risk for alcohol problems (Stoltenberg et al., 2008). While there was a correlation between P3 amplitude and BIS scores during the gain condition, the lack of correlation during the loss condition in our study may warrant further exploration
