Rather than focusing on amplitude training at specific brain sites as is done with traditional neurofeedback, coherence training concerns itself with the communication between sites or with different neurological regions in the brain.   Coherence can be considered a measurement of the similarity of frequency between different brain areas. Areas of the brain can be either hypocoherent (too different and therefore unconnected) or hypercoherent (too similar), both resulting in poor communication between sites.  Coherence training is used to improve the connectivity between different brain regions, resulting in improved neural connectivity and neural network dynamics.