9 Electronic measuring devices, namely, one- or multiple channel EEG amplifier; analyzers and diagnostic apparatus, not for medical purposes, namely, apparatus for recording audio, audio-visual, visual and tactile data, in particular physical data, including temperature, resistance, pressure, humidity, electrical current; apparatus for the reproduction of sound, images or data; frequency meters; thermometers, not for medical purposes; electronic control apparatus, electronic switching apparatus and electronic monitoring apparatus, namely, one- or multiple channel EEG amplifier with integrated impedance meter for testing lead wires, cables, electrodes and electrode site preparation prior to connecting the EEG instrument to the patient; data processing apparatus, couplers in the nature of data processing equipment and interfaces for computers which allows to record audio, audio-visual, visual and tactile data, in particular physical data, including temperature, resistance, pressure, humidity, electrical current and software for audio visional animation of the recorded data for use in neuro-feedback and bio-feedback; computer software which allows to record audio, audio-visual, visual and tactile-data, in particular physical data, including temperature, resistance, pressure, humidity, electrical current and software for audio visional animation of the recorded data for use in neuro-feedback and bio-feedback; electric apparatus and instruments in the field of training and/or education and/or training and further training, namely, computer programs and related computer hardware and computer peripheral devices for adding, processing, analyzing, evaluation and representation of data, namely, bio-electric or bio-physical as particularly electroencephalography data (EEG) of derivations of cerebral activity; neuro-feedback apparatus, namely, one- or multiple channel EEG amplifier with integrated impedance meter for testing lead wires, cables, electrodes and electrode site preparation prior to connecting the EEG instrument to the patient