analyzing physiological data from a plurality of viewers exposed to media to define a plurality of events in the media and to derive {HEAD ~ a plurality} of {TAIL ~ physiological response dimensions} from the physiological data for the plurality events 
analyzing physiological data from a plurality of viewers exposed to media to define a plurality of events in the media and to derive { HEAD ~ a plurality } of { TAIL ~ physiological response dimensions } from the physiological data for the plurality events
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH