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. 1990 Jul;54(1):1–12. doi: 10.1901/jeab.1990.54-1

Effects of ethanol on reinforced variations and repetitions by rats under a multiple schedule.

L Cohen 1, A Neuringer 1, D Rhodes 1
PMCID: PMC1322941  PMID: 2398323

Abstract

Response sequences emitted by five Long-Evans rats were reinforced under a two-component multiple schedule. In the REPEAT component, food pellets were contingent upon completion of a left-left-right-right (LLRR) sequence on two levers. In the VARY component, pellets were contingent upon variable sequences (i.e., a sequence was reinforced only if it differed from each of the previous five sequences). The rats learned to emit LLRR sequences in the REPEAT component and variable sequences in VARY. Intraperitoneal injections of ethanol (1.25, 1.75, and 2.25 g/kg) significantly increased sequence variability in REPEAT, thereby lowering reinforcement probability, but had little effect on sequence variability in the VARY component. These results extend previous findings that alcohol impairs the performance of reinforced repetitions but not of reinforced variations in response sequences.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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