A DRL Schedule with Temporal Adjustment

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Abstract
Rats under 48-hr. water deprivation were placed on a DRL schedule that required IRTs of 30 sec. or 60 sec. for the first component and longer IRTs of 120 sec., 150 sec., 180 sec., 240 sec., or 300 sec. for the second component. Ss were switched back and forth between components on the basis of their IRTs. These two-component DRL schedules utilizing various time requirements quickly produced rates of response as low as 20 per hour and still maintained responding over a 4-hr. session. When Ss were changed from the initial two-component DRL schedules to another, shifts in response rates occurred during the first session after a change and remained steady over several additional sessions.

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