Vigilance and the reinforcing properties of shock.
D000818:Animals; D001362:Avoidance Learning; D003214:Conditioning, Classical; D003216:Conditioning, Operant; D003213:Conditioning, Psychological; D004597:Electroshock; D004644:Emotions; D005108:Extinction, Psychological; D006041:Goats; D006339:Heart Rate; D006801:Humans; D008398:Masochism / Q000209:etiology; D009043:Motor Activity; D012054:Reinforcement, Psychology; D012119:Respiration; D013315:Stress, Psychological
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