Abstract
Most of EEG biofeedback studies so far were contents about the change of the subjective rating which accompanies alpha wave appearance. Although a number of clinical biofeedback applications have been reported, no systematic parametric study has appeared. For the next step of the study the effects of EEG biofeedback training upon behavioral measures have to be clarified in a systematic way. The purpose of this study was to test whether alpha wave increase training and beta wave increase training give a change in time estimation. Before and after the biofeedback training, 20 participants were asked to produce three different time intervals of 15,30 and 60 seconds. The findings were that the alpha biofeedback training tended to increase the time. estimation, although the beta biofeedback training tended to decrease the time. Taking those findings together it was suggested that the alpha biofeedback would relax the central nervous system which leads to increased time estimation, in contrast to the beta biofeedback has the reverse effect.
