approach over traditional ERP analytic methods has been bolstered by sound empirical evidence demonstrating that experimental ERP effects were not compromised after eliminating ambiguities stemming from the recording reference, but were clarified and supplemented by reliable new insights (Kayser and Tenke, 2006a, 2006b; Kayser et al., 2006, 2007, 2009; Tenke et al., 2008). Moreover, the CSD transform is a conservative source localization method, because it bridges between montage-dependent scalp potentials and their underlying current generators (e.g., Tenke and Kayser, 2005; Tenke et al., 2010).