ERO and PLI analyses were accomplished from the same datasets that were used to generate the ERP data reported in previous publications (Ehlers and Somes, 2002, Slawecki et al., 2003). Data from each trial generated by the stimuli were processed by a time-frequency analysis algorithm, which utilizes the S-transform (Stockwell et al., 1996), a generalization of the Gabor transform (Gabor, 1946), defined as: SjT,nNT=∑m=0N−1Hm+nNTe−2π2m2n2ei2πmjNn≠0
