Stress and EEG-alpha.

When stressed, subjectd showed increased arousal as measured by changes in pulse rate, skin conductance, and self-reports but did not show changes in EEG-alpha production. The finding that EEG-alpha was not sensitive to changes in arousal above the normal level is inconsistent with what has generally been assumed and suggests that alpha biofeedback training will not be effective for teaching persons to reduce high levels of arousal.