  In the current pilot study, we attempt to find out how double neurofeedback
influences functional hemispheric asymmetry and activity. We examined 30
healthy participants (8 males; 22 females, mean age = 29; SD = 8). To measure
functional hemispheric asymmetry and activity, we used computer laterometry in
the "two-source" lead-lag dichotic paradigm. Double biofeedback included 8 min
of EEG oscillation recording with five minutes of basic mode. During the basic
mode, the current amplitude of the EEG oscillator gets transformed into
feedback sounds while the current amplitude of alpha EEG oscillator is used to
modulate the intensity of light signals. Double neurofeedback did not directly
influence the asymmetry itself but accelerated individual sound perception
characteristics during dichotic listening in the preceding effect paradigm.
Further research is needed to investigate the effect of double neurofeedback
training on functional brain activity and asymmetry, taking into account
participants' age, gender, and motivation.
