Conditioned orienting and defensive responses.
D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001341:Autonomic Nervous System / Q000502:physiology*; D002560:Cerebrovascular Circulation; D003214:Conditioning, Classical; D004576:Electromyography; D005143:Eyelids / Q000502:physiology; D005260:Female; D005712:Galvanic Skin Response; D006339:Heart Rate; D006801:Humans; D009949:Orientation; D010698:Phobic Disorders; D010775:Photic Stimulation; D011603:Psychophysiology; D012119:Respiration; D012659:Semantic Differential; D013997:Time Factors