The findings of our previous study (Andrew and Fein, In Press) and reports in the literature on induced θ oscillations over frontal regions during target detection tasks (Deiber et al., 2007; Klimesch, 1996, 1999; Klimesch et al., 1998; Krause et al., 2000; Missonnier et al., 2006), led us to hypothesize that induced θ oscillations significantly discriminated the LTAA and NAC groups, and provide additional information beyond ERP measures for discriminating the groups. To investigate this hypothesis, we applied ERO analysis methods that directly measure non-phase-locked event-related EEG activity (Kalcher and Pfurtscheller, 1995) to the data from our previous study (Andrew and Fein, In Press).
