1. A method of whole-brain EEG neurofeedback training of a trainee using live Z-scores, the method comprising the steps of: establishing with the trainee at least 4 channels of EEG signals to acquire 248 Z-scores from 6 simultaneous interconnectivity paths; providing neurofeedback to the trainee in the form of one or more stimuli selected from the group of: animations, games, sounds, music or displays; the at least 4 channels including channels for measuring left intrahemispheric function indicative a language ability; right intrahemispheric function indicative of spatial ability; frontal intrahemispheric function indicative of attention and planning abilities, and posterior intrahemispheric function indicative of sensation and perception abilities; inputting all of the acquired Z-scores from each of the channels into a multivariate proportional algorithm to compute continuous output values in the form of multivariate proportional variables which represent a percentage measure of a proportionality of the Z-scores which are within pre-determined ranges, and providing an indication of the percentage of Z-scores which are within the pre-determined ranges.