In a later study, Andrew and Fein [142] reported significantly lower evoked delta ERO power as well as total delta and theta ERO power in long-term abstinent alcoholics (LTAAs) compared to the nonalcoholic controls (NACs), replicating Jones et al. [78] results. However, on the basis of the similar magnitude of effect sizes for the ERO power and P3 amplitude in their study, in contrast to Jones et al. [78] and Rangaswamy et al. [141], these authors concluded that ERO power does not provide a more powerful group discriminator than P3 amplitude. In another study using the same sample, Andrew and Fein [143] reported significantly higher induced theta power in LTAAs as compared to NACs. Based on this finding, the authors concluded that induced (non-phase locked) theta oscillations are more powerful and independent group discriminators than the P3 amplitude.
