15. The method of claim 14 further comprising presenting the media instance and one or more of the brain wave data, the first energy, the second energy, the third energy, the fourth energy, the first difference, the second difference, the first output signal, the second output signal or the third output signal via a rendering.
15. The method of claim 14 further comprising presenting the media instance and one or more of the brain wave data, the first energy, the second energy, the third energy, the fourth energy, the first difference, the second difference, the first output signal, the second output signal or the third output signal via a rendering. 22. The method of claim 15 , further comprising aggregating output signals from a plurality of viewers.