What is neurofeedback?

Neurofeedback is essentially EEG operant conditioning using a brain-computer interface. Most the systems out there use multiple frequency bands and train the brain to correct itself according to external stimuli.

Popular Neurofeedback Protocols:

ex: Neuroptimal, TAGSync, HEG, ILF protocols

Hardware

Medium-Range:

NeuroBit Qwhiz

Consumer EEGs:

ex: Emotiv, Muse, Neurosky etc.