文章基本信息

标题：Discriminative Learning After Uncontrollable Shocks
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作者：Angelica Capelari ; Maria Helena Leite Hunziker
期刊名称：Interação em Psicologia
印刷版ISSN：1516-1854
出版年度：2009
卷号：13
期号：01
出版社：Universidade Federal do Parana̧, Departamento de Psicologia
摘要：This experiment investigated whether non-contingent (uncontrollable) aversive stimuli can produceinterference on subsequent positively reinforced discriminative learning. In the first session, rats weredivided into three groups (n=8) exposed to controllable (C), uncontrollable (I) or no-shock (N)conditions. After that, all rats were exposed to 10 sessions of positive reinforcement under a multipleconcurrentFR 6/Extinction. The results showed a transitory effect: in the first session of thediscriminative training, previous exposure to shocks reduced response frequency, and this suppressiveeffect was slightly stronger for group I; in the tenth session, all groups showed high responsefrequency and equal discriminative indexes (higher than 0,80). These results suggest thatuncontrollable aversive stimuli do not interfere on positively reinforced discriminative learning,contrary to a generalized learned helplessness effect between aversive and appetitive contexts.