The attenuated δ power measures in alcoholics are also consistent with previous studies of the visual P3 to target stimuli using different but analogous time–frequency analysis techniques. In all three studies, significant differences between alcoholics and controls were limited to the δ and θ bands. Jones et al. (2006) reported that evoked and total δ and θ total power were lower in alcoholics than controls. Rangaswamy et al. (2007) reported that the offspring of alcoholics had lower evoked and total δ power and lower θ total power when compared with controls. More recently, Andrew and Fein (2010) reported that alcoholics had lower evoked and total δ power and lower θ total power than controls. To our knowledge, time–frequency analysis has only once been used to compare EEG between alcoholics and control in the context of a GO/NOGO task using a matching pursuit approach to signal decomposition that provides a measure similar to total power (Kamarajan et al. 2004). They reported that δ power was lower in alcoholics in both the GO and NOGO conditions, with the effects larger in the
