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