Psychonomic Science

, Volume 10, Issue 5, pp 155–156 | Cite as

Concurrent facilitation of food-reinforced, spaced licking and depression of schedule-induced, polydipsic licking by amphetamine

  • Evalyn F. Segal
  • David L. Oden
Physiological Psychology Drug and Chemical Effects


Two rats that were reinforced with food for spacing their water licks at least 20 sec apart showed a licking pattern that alternated irregularly between low-rate (operant) licking and high-rate (polydipsic) licking. Intraperitoneal administration of 2 mg/kg of d,1-amphetamine sulfate just before a session caused the spaced, operant licking to increase in rate while at the same time the high-rate, polydipsic licking bursts decreased in duration and regularity.


Amphetamine Rate Lick Food Schedule Food Reinforcement Schedule Follow Drug Injection 
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Copyright information

© Psychonomic Journals 1968

Authors and Affiliations

  • Evalyn F. Segal
    • 1
  • David L. Oden
    • 1
  1. 1.San Diego State CollegeSan DiegoUSA

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