Because of prior evidence indicating the importance of frontal theta oscillations during the no-go condition and posterior delta oscillations during the go condition of the GNG task38,70,71 and a preliminary analysis to determine time-frequency regions of interest, the present study used S-transformed frontal theta total power (4–7.5 Hz, 200–400 ms, Fz) during the no-go (response inhibition) and go conditions and, for comparison, posterior delta total power (1–3.5 Hz, 200–500 ms, Pz) during the go and no-go conditions at baseline and follow-up assessments 1 through 4. Further details about the ERO signal processing using S-transformed method can be found in a previous publication (that study was conducted in a different analytic sample).72
