Psychonomic Science

, Volume 15, Issue 3, pp 153–154 | Cite as

Schedule-induced polydipsia: Effects of providing an alternate reinforced response and of introducing a lick-contingent delay in food delivery

  • Evalyn F. Segal
  • David L. Oden
Animal Psychology Motivation


In Experiment 1, rats exhibited polydipsia on a concurrent spaced-response, variable-ratio schedule of reinforcement for bar presses on two bars, indicating that even the availability of a reinforcement schedule (VR) that encourages high and steady bar-pressing rates does not eliminate the polydipsia induced by the spacing of food. In Experiment 2, rats developed polydipsia in response to a spaced-food schedule, even though every water lick delayed food delivery for 30–60 sec, indicating that the development of polydipsia does not depend on adventitious food reinforcement.


Reinforcement Schedule Food Delivery Food Reinforcement Food Schedule Psychogenic Polydipsia 
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Copyright information

© Psychonomic Journals, Inc. 1969

Authors and Affiliations

  • Evalyn F. Segal
    • 1
  • David L. Oden
    • 2
  1. 1.University of Illinois at Chicago CircleChicagoUSA
  2. 2.University of PennsylvaniaPhiladelphiaUSA

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