The "orienting reflex" as an input indicator in "subliminal" perception.
D000374:Aggression; D003071:Cognition; D003214:Conditioning, Classical; D003463:Cues; D005133:Eye Movements; D005260:Female; D006801:Humans; D008297:Male; D009949:Orientation; D010467:Perceptual Defense; D010775:Photic Stimulation; D011386:Projective Techniques; D011930:Reaction Time; D013360:Subliminal Stimulation; D014796:Visual Perception