  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
minutes 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.
