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EFFECTS OF ELECTRIC‐SHOCK DELIVERY ON SCHEDULE‐INDUCED WATER INTAKE: DELAY OF SHOCK, SHOCK INTENSITY, AND BODY‐WEIGHT LOSS
Author(s) -
Hymowitz Norman
Publication year - 1976
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.1976.26-269
Subject(s) - licking , shock (circulatory) , electric shock , zoology , food delivery , body weight , chemistry , mechanics , medicine , biology , physics , quantum mechanics , marketing , business
In each of four experiments, schedule‐induced water intake in the rat was studied under fixed‐time 40‐sec food delivery. Experiments I and II studied the temporal relationship between response‐independent electric‐shock delivery and licking. Shock was delivered under a variable‐time 60‐sec schedule. A lick‐dependent delay was imposed so that licking and shock delivery were systematically separated in time by a minimum of 1 to 15 sec. Over a wide range of shock intensities, the data failed to reveal a consistent delay‐of‐shock effect. Similar shock intensities led to similar reduction of water intake at each delay of shock interval. Experiments III and IV studied the effects of body‐weight loss on water intake during independent shock delivery. In Experiment III, shock was delivered under variable‐time 60‐sec with a minimum separation between shock and licking of 5 sec. In Experiment IV, shock was delivered under variable‐time 180‐sec. The minimum separation between shock and licking was 10 sec. In each study, the resistance of water intake to suppression by shock delivery increased as the degree of body‐weight loss increased. Schedule‐induced water intake was affected more by shock when the animal was maintained at 90% of free‐feeding weight than at 70%.