not supported in analyses (Section S3 in the Supplement). Moreover, both low-alpha/theta and high-alpha were required to reliably differentiate between responders and nonresponders. Conventional EEG analysis did show a reduction in anterior-to-posterior gradient of condition-dependent theta power in nonresponders (Section S5 in the Supplement). We conclude that the observed group differences in the low-alpha/theta factor do not reflect theta, or midline frontal theta in particular, but rather are specific to classic posterior alpha.
