P3 has assumed its precedence in the current study; 3) FRN/N2 is a relatively subtle component and more prone to artifact distortions, rendering it more difficult to measure (especially in such a large sample of adolescents and young adults) compared to the large P3 component; and 4) implementation of a more sophisticated source localization method (e.g., sLORETA) may be essential to examine the key brain sources (e.g., anterior cingulate region) attributed to the FRN (Crowley et al., 2013). For these reasons, only the P3 component has been dealt with in the current study. As current source density (CSD), a source derivation method of electrophysiological activity, has been successfully used in several neuropsychiatric disorders including alcoholism (for a review, see Kamarajan et al., 2015), we have also compared CSD topography across the groups (see Section 2.5 for more information on the CSD method).
