The development of water drinking on a dry-food free-reinforcement schedule
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Rats were given a food pellet every 60 sec., not contingent on operant responding. All rats developed over days a pattern of prolonged water drinking following delivery of food pellets. One of the rats, whose operant-level lever pressing was recorded concurrently with licking, developed a complex pattern of drinking and bar pressing which persisted even after a 5-sec. delay of reinforcement for bar presses was introduced.
KeywordsFood Pellet Reinforcement Schedule Modal Duration Adventitious Reinforcement Pellet Delivery
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