title: Schedule-induced drinking as a function of interreinforcement interval in the rhesus monkey.
abstract: Lever presses by two rhesus monkeys produced food pellets that were assigned by both an ascending and descending series of fixed-interval schedules whose values varied between 1 and 512 sec. The amount of schedule-induced drinking was bitonically related to interreinforcement interval, reaching a maximum at approximately 120 sec and declining at longer fixed intervals. The relation between water intake and interreinforcement interval was complexly related to two drinking measures: (1) the probability of drinking following a pellet and (2) the amount drunk per bout. Drinking rate was also bitonically related to interreinforcement interval.
authors.forename: J D
authors.initials: JD
authors.lastname: Allen
authors.forename: D R
authors.initials: DR
authors.lastname: Kenshalo