A method of assessing consumer reaction to a marketing stimulus, involving the steps of (a) exposing a sample population to a marketing stimulus for an exposure period, (b) measuring surface electromyography signals from a zygomatic muscle of each member of the sample population during an exposure period,...http://www.google.fr/patents/US6422999?utm_source=gb-gplus-shareBrevet US6422999 - Method of measuring consumer reaction
