Journal
BEHAVIORAL NEUROSCIENCE
Volume 115, Issue 2, Pages 394-402Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0735-7044.115.2.394
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Funding
- Medical Research Council [G9537855] Funding Source: researchfish
- MRC [G9537855] Funding Source: UKRI
- Medical Research Council [G9537855] Funding Source: Medline
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(I)n two experiments rats were trained to self-administer intravenous cocaine on chained schedules using different responses in the initial (drug-seeking) and terminal (drug-taking) links. In both between(Experiment 1) and within-subject designs (Experiment 2), the drug-taking response was then either extinguished or reinforced in the absence of the opportunity to perform the seeking response. In a subsequent extinction test with the seeking manipulanda alone, the rate of drug seeking was reduced after the prior extinction of the associated taking response. An additional group trained with a sucrose reinforcer showed a comparable devaluation effect, These findings demonstrate that seeking responses for cocaine and food rewards are mediated by a representation of the contingency between seeking responses and the opportunity to take the reward.
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