The study asks whether voluntary control over the relative appearance of EEG alpha in midline frontal and parietal sites can be achieved with auditory biofeedback training. 16 Ss participated in the training and testing regimen. Ss varied in the number of hour-long single-channel feedback training sessions received. In the test period, dual-channel feedback was given, and Ss were asked to increase the ratio of frontal to parietal alpha and then the reverse. Evidence for small but significant control is presented. Amount of control was correlated with number of practice sessions.
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