Heart rate in anticipation of shocks which have different probabilities of occurrences.
D004597:Electroshock; D005133:Eye Movements; D006185:Habituation, Psychophysiologic; D006339:Heart Rate; D006801:Humans; D008297:Male; D009068:Movement; D010146:Pain / Q000209:etiology; D011336:Probability; D011603:Psychophysiology; D012055:Reinforcement Schedule